Entry 6 senses · 3 variants Webster, 1913 Plagiary · Pla·gia·ry · IPA /ˈpleɪdʒ(ɪ)əɹi/ v. i. n. a. 01 v. i. To commit plagiarism. 1. To commit plagiarism. 02 n. A manstealer; a kidnaper. pl. Plagiaries ((#)) 1. A manstealer; a kidnaper.[Obs.] 2. One who purloins another's expressions or ideas, and offers them as his own; a plagiarist. 3. Plagiarism; literary theft. 03 a. Kidnaping. 1. Kidnaping.[Obs.] 2. Practicing plagiarism.