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What Is Plagiarism?: Definitions

Is It Plagiarism?

Using parts of your assignment from another course in a new paper without citing your source.

Is It Plagiarism?
Yes, it's plagiarism.: 1213 votes (78.51%)
It's not plagiarism, but it's still cheating.: 146 votes (9.45%)
There's no problem with re-using your own work.: 186 votes (12.04%)
Total Votes: 1545

A Basic, Comprehensive Definition

Most definitions of plagiarism describe it as the theft of someone's words or ideas.

At the same time, most of them aren't as clear that plagiarism is a kind of fraud. Fraud is misrepresentation that aims to gain an unfair advantage. 

Since many cases of plagiarism don't involve any actual theft, and all of them involve misrepresentation, fraud seems to be a better description of what's wrong with plagiarism.

Plagiarism is the act of representing intellectual work as something it is not -- including representing someone else's work as your own and representing your own previous work as something new.

The Oxford English Dictionary (OED)

“The action or practice of taking someone else's work, idea, etc., and passing it off as one's own; literary theft.”

("plagiarism, n." OED Online. December 2012. Oxford University Press. 3 January 2013 <>.)

Modern Language Association (MLA)

"Merriam-Webster’s Collegiate Dictionary defines plagiarizing as committing “literary theft.” Plagiarism is presenting another person’s ideas, information, expressions, or entire work as one’s own. It is thus a kind of fraud: deceiving others to gain something of value. While plagiarism only sometimes has legal repercussions (e.g., when it involves copyright infringement—violating an author’s exclusive legal right to publication), it is always a serious moral and ethical offense."

(MLA Handbook, 8th ed., p. 6-7)

Also see the MLA Style Center.

American Psychological Association (APA)

"Plagiarism. Researchers do not claim the words and ideas of another as their own; they give credit where credit is due (APA Ethics Code Standard 8.11, Plagiarism)."

"Just as researchers do not present the work of others as their own (plagiarism), they do not present their own previously published work as new scholarship (self-plagiarism)."

(Publication Manual of the American Psychological Association, 6th ed., pp. 15-16.)

West's Encyclopedia of American Law

“The act of appropriating the literary composition of another author, or excerpts, ideas, or passages therefrom, and passing the material off as one's own creation.”

("Plagiarism." West's Encyclopedia of American Law. Ed. Shirelle Phelps and Jeffrey Lehman. 2nd ed. Vol. 7. Detroit: Gale, 2005. 454-456. Gale Virtual Reference Library. Web. 3 Jan. 2013.)

Bill Badke

“Any time I leave the impression that the words or ideas I‘ve written are mine, when actually they came from someone else, I am plagiarizing.”

(Bill Badke, “Plagiarism, eh? : How to recognize it and get it out of your life”)

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