Webster's Revised Unabridged Dictionary · 1913

Plagiary

Plagiary , intransitive verb

To commit plagiarism.

Plagiary , noun

[Latin plagiarius a kidnaper, a literary thief, from plagium kidnaping; compare plaga a net, perh. akin to English plait: compare French plagiaire.]

1.
A manstealer; a kidnapper. [Obsolete]
2.
One who purloins another's expressions or ideas, and offers them as his own; a plagiarist. — Dryden
3.
Plagiarism; literary theft. — Milton

Plagiary , adjective

1.
Kidnapping. [Obsolete] — E. Browne
2.
Practicing plagiarism. — Bp. Hall