pla ‧ gia ‧ ris ‧ m /ˈpleɪdʒərɪz ə m/ BrE AmE noun
[ Date: 1600-1700 ; Origin: plagiary 'plagiarism' (17-19 centuries) , from Latin plagiarius 'thief' , from plagium 'hunting net' ]
1 . [uncountable] when someone uses another person’s words, ideas, or work and pretends they are their own:
The journal accused the professor of plagiarism.
2 . [countable] 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]