|Origin:||plagiary 'plagiarism' (17-19 centuries), from Latin plagiarius 'thief', from plagium 'hunting net'|
when someone uses another person's words, ideas, or work and pretends they are their own:
The journal accused the professor of plagiarism.
an idea, phrase, or story that has been copied from another person's work, without stating where it came from:
claims that there are plagiarisms in the new software
—plagiarist noun [countable]