Definition · Plain-language
Plagiarism
Plagiarism is presenting another person’s work, ideas, words or data as your own without adequate acknowledgement — a fundamental breach of academic integrity.
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The main types of plagiarism
Plagiarism takes several recognised forms. Direct or verbatim plagiarism copies text word for word without quotation marks or citation. Mosaic or patchwork plagiarism stitches together phrases from one or more sources with minor changes. Paraphrasing without citation restates an idea in new words but omits the source. Self-plagiarism reuses your own previously submitted or published work without disclosure. Accidental plagiarism arises from careless note-taking, missing quotation marks or incorrect citation. All of these breach academic integrity, regardless of whether the omission was deliberate, because intent does not change the failure to attribute.
Why it matters to scholarship
Academic and scientific work depends on a clear record of who contributed which idea, so that claims can be traced to their evidence and credit is fairly assigned. Plagiarism corrupts that record: it misattributes intellectual ownership, misleads readers about the originality of the work, and undermines the trust that lets scholarship build cumulatively. Publication-ethics bodies such as COPE and journal editors treat plagiarism as serious research misconduct, and detection can trigger correction, retraction or rejection. In coursework it commonly leads to a failed grade, a disciplinary record or, in severe cases, expulsion.
How to avoid it
The defence against plagiarism is consistent attribution. Quote exact wording inside quotation marks with a citation; paraphrase by genuinely rewording and restructuring, again with a citation; and summarise longer passages while still crediting the source. Keep meticulous notes that mark which words are yours and which are copied, and record full source details at the point of reading. When in doubt, cite. Using a recognised citation style — such as APA, MLA or Chicago — consistently throughout a piece of work makes attribution clear and verifiable to readers and examiners alike.
Key facts
At a glance
- Definition: presenting another’s work, ideas, words or data as your own without acknowledgement
- Types: direct/verbatim, mosaic/patchwork, paraphrasing without citation, self-plagiarism, accidental
- Status: an academic-integrity breach, not in itself a crime
- Overlap: can involve copyright infringement when protected material is copied
- Intent: not required — accidental plagiarism still counts as plagiarism
- Consequences: correction, retraction, failed grades or disciplinary action
Common misconceptions
What people often get wrong
Often heard: Plagiarism is illegal and you can be prosecuted for it.
Actually: Plagiarism is an academic-integrity and publication-ethics breach, not a crime in itself. It can overlap with copyright infringement, which is a legal matter, but the act of failing to attribute is handled through academic and editorial processes.
Often heard: It is only plagiarism if I copy text word for word.
Actually: Verbatim copying is one form. Paraphrasing without citation, mosaic plagiarism, reusing your own work and reproducing data without credit are all plagiarism, because each presents another’s contribution as your own.
Often heard: If I did not mean to plagiarise, it does not count.
Actually: Intent does not change the breach. Accidental plagiarism — from sloppy notes or missing quotation marks — is still plagiarism, although institutions may weigh intent when deciding the penalty.
