plagiarize

UK: /ˈpleɪdʒəraɪz/

US: /ˈpleɪdʒəˌraɪz/

US: (plā′jə rīz′, -jē ə rīz′)

Inflections of 'plagiarize' (v): (⇒ conjugate)

plagiarizes

v 3rd person singular (US & UK)

plagiarizing

v pres p (US & UK)

plagiarized

v past (US & UK)

plagiarized

v past p (US & UK)

WordReference Random House Learner's Dictionary of American English © 2026

pla•gia•rize /ˈpleɪdʒəˌraɪz/   v., -rized, -riz•ing. 

1. Literature to steal by plagiarism: [~ + object]
   He plagiarized the ideas as his own.
   [no object]
   They were pretty sure he had plagiarized, but it was hard to prove.

pla•gia•rist, n. [countable]

WordReference Random House Unabridged Dictionary of American English © 2026

pla•gia•rize  (plā′jə rīz′, -jē ə rīz′), v., -rized, -riz•ing. 
v.t. 

1. Literature to take and use by plagiarism.
2. Literature to take and use ideas, passages, etc., from (another's work) by plagiarism.

v.i. 

3. Literature to commit plagiarism.

Also,[esp. Brit.,] pla′gia•rise′. 

• plagiar(ism) + -ize 1710–20

pla′gia•riz′er, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

plagiarize, plagiarise / ˈpleɪdʒəˌraɪz/ verb

1. to appropriate (ideas, passages, etc) from (another work or author)

ˈplagiaˌrizer, ˈplagiaˌriser noun