Incredibly, neither Treccani [1] nor Wiktionary mention that meaning even for the Latin word. [2] However there's a page on Wikipedia in English [3] and Italia

Incredibly, neither Treccani [1] nor Wiktionary mention that meaning even for the Latin word. [2] However there's a page on Wikipedia in English [3] and Italian [4] and also Treccani mentions this meaning in Plagiare’s thesaurus [5] only. If feels like it's meant as "to enslave", either physically or mentally. 1: https://www.treccani.it/vocabolario/plagiare/ 2: https://en.wiktionary.org/wiki/plagium 3: https://en.wikipedia.org/wiki/Plagio 4: https://it.wikipedia.org/wiki/Plagio_(ordinamento_penale_italiano) 5: https://www.treccani.it/vocabolario/plagiare_%28Sinonimi-e-Contrari%29/