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Definition of thesis

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In high school, college, or graduate school, students often have to write a thesis on a topic in their major field of study. In many fields, a final thesis is the biggest challenge involved in getting a master's degree, and the same is true for students studying for a Ph.D. (a Ph.D. thesis is often called a dissertation ). But a thesis may also be an idea; so in the course of the paper the student may put forth several theses (notice the plural form) and attempt to prove them.

Examples of thesis in a Sentence

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'thesis.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

in sense 3, Middle English, lowering of the voice, from Late Latin & Greek; Late Latin, from Greek, downbeat, more important part of a foot, literally, act of laying down; in other senses, Latin, from Greek, literally, act of laying down, from tithenai to put, lay down — more at do

14th century, in the meaning defined at sense 3a(1)

Dictionary Entries Near thesis

the sins of the fathers are visited upon the children

thesis novel

Cite this Entry

“Thesis.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/thesis. Accessed 21 Apr. 2024.

Kids Definition

Kids definition of thesis, more from merriam-webster on thesis.

Nglish: Translation of thesis for Spanish Speakers

Britannica English: Translation of thesis for Arabic Speakers

Britannica.com: Encyclopedia article about thesis

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While Sandel argues that pursuing perfection through genetic engineering would decrease our sense of humility, he claims that the sense of solidarity we would lose is also important.

This thesis summarizes several points in Sandel’s argument, but it does not make a claim about how we should understand his argument. A reader who read Sandel’s argument would not also need to read an essay based on this descriptive thesis.  

Broad thesis (arguable, but difficult to support with evidence) 

Michael Sandel’s arguments about genetic engineering do not take into consideration all the relevant issues.

This is an arguable claim because it would be possible to argue against it by saying that Michael Sandel’s arguments do take all of the relevant issues into consideration. But the claim is too broad. Because the thesis does not specify which “issues” it is focused on—or why it matters if they are considered—readers won’t know what the rest of the essay will argue, and the writer won’t know what to focus on. If there is a particular issue that Sandel does not address, then a more specific version of the thesis would include that issue—hand an explanation of why it is important.  

Arguable thesis with analytical claim 

While Sandel argues persuasively that our instinct to “remake” (54) ourselves into something ever more perfect is a problem, his belief that we can always draw a line between what is medically necessary and what makes us simply “better than well” (51) is less convincing.

This is an arguable analytical claim. To argue for this claim, the essay writer will need to show how evidence from the article itself points to this interpretation. It’s also a reasonable scope for a thesis because it can be supported with evidence available in the text and is neither too broad nor too narrow.  

Arguable thesis with normative claim 

Given Sandel’s argument against genetic enhancement, we should not allow parents to decide on using Human Growth Hormone for their children.

This thesis tells us what we should do about a particular issue discussed in Sandel’s article, but it does not tell us how we should understand Sandel’s argument.  

Questions to ask about your thesis 

• Is the thesis truly arguable? Does it speak to a genuine dilemma in the source, or would most readers automatically agree with it?  
• Is the thesis too obvious? Again, would most or all readers agree with it without needing to see your argument?  
• Is the thesis complex enough to require a whole essay's worth of argument?  
• Is the thesis supportable with evidence from the text rather than with generalizations or outside research?  
• Would anyone want to read a paper in which this thesis was developed? That is, can you explain what this paper is adding to our understanding of a problem, question, or topic?
• picture_as_pdf Thesis

• Literary Terms
• Definition & Examples
• When & How to Write a Thesis

I. What is a Thesis?

The thesis (pronounced thee -seez), also known as a thesis statement, is the sentence that introduces the main argument or point of view of a composition (formal essay, nonfiction piece, or narrative). It is the main claim that the author is making about that topic and serves to summarize and introduce that writing that will be discussed throughout the entire piece. For this reason, the thesis is typically found within the first introduction paragraph.

II. Examples of Theses

Here are a few examples of theses which may be found in the introductions of a variety of essays :

In “The Mending Wall,” Robert Frost uses imagery, metaphor, and dialogue to argue against the use of fences between neighbors.

In this example, the thesis introduces the main subject (Frost’s poem “The Mending Wall”), aspects of the subject which will be examined (imagery, metaphor, and dialogue) and the writer’s argument (fences should not be used).

While Facebook connects some, overall, the social networking site is negative in that it isolates users, causes jealousy, and becomes an addiction.

This thesis introduces an argumentative essay which argues against the use of Facebook due to three of its negative effects.

During the college application process, I discovered my willingness to work hard to achieve my dreams and just what those dreams were.

In this more personal example, the thesis statement introduces a narrative essay which will focus on personal development in realizing one’s goals and how to achieve them.

III. The Importance of Using a Thesis

Theses are absolutely necessary components in essays because they introduce what an essay will be about. Without a thesis, the essay lacks clear organization and direction. Theses allow writers to organize their ideas by clearly stating them, and they allow readers to be aware from the beginning of a composition’s subject, argument, and course. Thesis statements must precisely express an argument within the introductory paragraph of the piece in order to guide the reader from the very beginning.

IV. Examples of Theses in Literature

For examples of theses in literature, consider these thesis statements from essays about topics in literature:

In William Shakespeare’s “ Sonnet 46,” both physicality and emotion together form powerful romantic love.

This thesis statement clearly states the work and its author as well as the main argument: physicality and emotion create romantic love.

In The Scarlet Letter, Nathaniel Hawthorne symbolically shows Hester Prynne’s developing identity through the use of the letter A: she moves from adulteress to able community member to angel.

In this example, the work and author are introduced as well as the main argument and supporting points: Prynne’s identity is shown through the letter A in three ways: adulteress, able community member, and angel.

John Keats’ poem “To Autumn” utilizes rhythm, rhyme, and imagery to examine autumn’s simultaneous birth and decay.

This thesis statement introduces the poem and its author along with an argument about the nature of autumn. This argument will be supported by an examination of rhythm, rhyme, and imagery.

V. Examples of Theses in Pop Culture

Sometimes, pop culture attempts to make arguments similar to those of research papers and essays. Here are a few examples of theses in pop culture:

America’s food industry is making a killing and it’s making us sick, but you have the power to turn the tables.

The documentary Food Inc. examines this thesis with evidence throughout the film including video evidence, interviews with experts, and scientific research.

Orca whales should not be kept in captivity, as it is psychologically traumatizing and has caused them to kill their own trainers.

Blackfish uses footage, interviews, and history to argue for the thesis that orca whales should not be held in captivity.

VI. Related Terms

Just as a thesis is introduced in the beginning of a composition, the hypothesis is considered a starting point as well. Whereas a thesis introduces the main point of an essay, the hypothesis introduces a proposed explanation which is being investigated through scientific or mathematical research. Thesis statements present arguments based on evidence which is presented throughout the paper, whereas hypotheses are being tested by scientists and mathematicians who may disprove or prove them through experimentation. Here is an example of a hypothesis versus a thesis:

Hypothesis:

Students skip school more often as summer vacation approaches.

This hypothesis could be tested by examining attendance records and interviewing students. It may or may not be true.

Students skip school due to sickness, boredom with classes, and the urge to rebel.

This thesis presents an argument which will be examined and supported in the paper with detailed evidence and research.

Introduction

A paper’s introduction is its first paragraph which is used to introduce the paper’s main aim and points used to support that aim throughout the paper. The thesis statement is the most important part of the introduction which states all of this information in one concise statement. Typically, introduction paragraphs require a thesis statement which ties together the entire introduction and introduces the rest of the paper.

VII. Conclusion

Theses are necessary components of well-organized and convincing essays, nonfiction pieces, narratives , and documentaries. They allow writers to organize and support arguments to be developed throughout a composition, and they allow readers to understand from the beginning what the aim of the composition is.

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Definition of thesis noun from the Oxford Advanced American Dictionary

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Definition of 'thesis'

Video: pronunciation of thesis

thesis in American English

Thesis in british english, examples of 'thesis' in a sentence thesis, related word partners thesis, trends of thesis.

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In other languages thesis

• American English : thesis / ˈθisɪs /
• Brazilian Portuguese : tese
• Chinese : 论点
• European Spanish : tesis
• French : thèse
• German : These
• Italian : tesi
• Japanese : 主張
• Korean : 논지
• European Portuguese : tese
• Spanish : tesis
• Thai : ข้อสมมุติ, ข้อวินิจฉัย

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thesis statement

[ thee -sis steyt-m uh nt ]

• a short statement, usually one sentence, that summarizes the main point or claim of an essay, research paper, etc., and is developed, supported, and explained in the text by means of examples and evidence.

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Word history and origins.

Origin of thesis statement 1

More About Thesis Statement

What is a thesis statement .

In academic writing, a thesis statement is generally a sentence or two that summarizes the main point that an essay, research paper, or speech is making. It is typically located at the end of the introductory paragraph(s).

Thesis statements are kind of like roadmaps, laying out for the reader/listener where the writer/speaker is headed (argument) and how they are going to get there (evidence).

The thesis statement is widely taught in the humanities, especially in English classes in high school and college, to teach students how to make persuasive arguments that cite and analyze evidence and examples researched from literary, historical, or other texts.

Why is a thesis statement important in an essay?

Thesis comes from a Greek word that literally means “a setting down.” In the 300s BC, Aristotle defined thesis as when a philosopher puts forth a new idea that conflicts with general opinion.

Fast forward to today, when we use thesis to mean a “proposition” or “argument” one formally presents and defends. In academic settings, a thesis can be short for a thesis statement (our focus here) in an essay or shorter research paper. It can also be used for those much, much longer dissertations graduate students research, write, and defend for their degree (e.g., master’s thesis or doctoral thesis ).

Let’s look at statement real quick. It is a declaration or assertion. Sound redundant? The idea is that a thesis statement is the point in a paper or presentation that explicitly states the thesis. Usually in a sentence or two, the thesis statement summarizes the argument that’s going to be developed in the evidence and examples to come.

So, a thesis statement is just a sentence that gets the main point across. But, learning how to write these ain’t easy. That’s why educators, especially in English classes in high school and college, spend a lot of time teaching students how to craft effective thesis statements.

Why? Because in school, work, and life, we have to persuade people of our ideas and our point of view. These ideas might concern an analysis of literature or history, like a play by Shakespeare or a moment in the Civil Rights Movement. Or, these ideas might be a call to action, such as eating a certain diet or pursuing a business strategy.

How to write a thesis statement

There are many ways to make an effective thesis statement , but here are some general tips to follow.

So, let’s say you read a text, Shakespeare’s Twelfth Night , or researched a topic, the health benefits of kale. Then you formed an opinion about it—a claim you want to make about it and why others should care. You found evidence—quotes, examples, facts, statistics—in your resources that you think back up your argument. Your thesis statement brings all these together: point of view , evidence , and significance . It lays out where the entire paper or presentation is going, which is why educators often liken it to a roadmap .

Here’s an example:

Kale is good for you because it is nutrient-dense, cancer-fighting, and loaded with antioxidants.

The argument here—which a first-year high-schooler might make in a persuasive essay—is that “kale is good for you” (despite how some think it tastes). The claims it’s using to back up this assertion are that it’s 1) “nutrient-dense”; 2) “cancer-fighting”; and 3) “loaded with antioxidants.” The reader can expect that the rest of the essay will develop these claims, that is, cite and analyze evidence for them.

Here’s a thesis statement for a literary analysis of Shakespeare’s Twelfth Night. This resembles more of a college-level example:

Shakespeare’s Twelfth Night suggests that, when women do not reciprocate a man’s love, they are unjustly made out to be sexually deviant. This is illustrated in how the character Olivia is condemned as asexual because of her rejection of Duke Orsino.

Note how this thesis statement makes its claim in two sentences. Its argument centers on how women characters are vilified when they reject a man, and its evidence will be interactions between characters in Shakespeare’s play.

What are real-life examples of thesis statement ?

The term thesis statement is generally used by teachers and students in junior high, high school, and college, especially in English, Social Studies, and other classes in the humanities.

Okay so I rewrote my thesis statement! It’s a wee bit more vague but still a good direction a think. It’s more open so I can talk about more things and add more evidence. Wrote out an in-depth plan and then my brain crapped out. So I’m going to bed! Tomorrow is the day! — 🎃Unpaid Bills🎃 //Chaela (@Cierafire) August 14, 2019

Writing an explanatory essay in phases: thesis statement, body paragraph, concluding statement. Peer conversations to identify text evidence to support our thesis. pic.twitter.com/b6fdgx8rkD — Cheyenne England (@MsEnglandReads) August 7, 2019

The thesis statement is taught in what’s called the five-paragraph essay (or theme). This essay has an introduction which “funnels into” the thesis statement, including three reasons backing up the main argument. The next three paragraphs develop each of these claims, respectively, citing evidence and examples, such as literary texts, historical documents, or scientific reports. The final paragraph, the conclusion, restates the thesis statement and summarizes the paper and its broader significance.

Opentextbc.ca

Even after we are no longer in the classroom, people continue to reference thesis statements. While “real-life” thesis statements may not be as formal as the ones seen in five-paragraph essays, having a thesis statement —a point, a position, or a theory of the case—is considered informative, persuasive, and valuable in work, in the community, and in our personal lives.

The thesis statement is so widely taught and familiar that sometimes people joke about them. On social media, for instance, people may humorously end a post with “In this essay, I will …” when expressing a deeply felt but ultimately low-stakes opinion on some popular topic. The phrase In this essay, I will alludes to the signposting language some people use in their thesis statements.

pumpkin spice has nothing to do with pumpkins but with covering up pumpkin taste, it's a way to disassociate from the world rather than experience it, which mirrors late capitalism; in this essay I will — rachel syme (@rachsyme) August 15, 2019

[ ak -s uh -lot-l ]

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Meaning of theses in English

Examples of theses.

Word of the Day

have irons in the fire

to be involved with many activities or jobs at the same time or to make certain that there are always several possibilities available

Binding, nailing, and gluing: talking about fastening things together

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