Entry 2 senses Webster, 1913 Plagiarism /(plā"jȧ*rĭz'm [or] plā"jĭ*ȧ*rĭz'm; 277)/ · Pla·gia·rism · IPA /ˈpleɪd͡ʒəɹɪzəm/ 01 n. The act or practice of plagiarizing. 1. The act or practice of plagiarizing. 2. That which is plagiarized; a work which has been plagiarized.