Etymology
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authorize (v.)

late 14c., auctorisen, autorisen, "give formal approval or sanction to," also "confirm as authentic or true; regard (a book) as correct or trustworthy," from Old French autoriser, auctoriser "authorize, give authority to" (12c.) and directly from Medieval Latin auctorizare, from auctor (see author (n.)). Meaning "give authority or legal power to" is from mid-15c. Modern spelling from late 16c. Related: Authorized; authorizing. Authorized Version as a popular name for the 1611 ("King James") English Bible is by 1811.

updated on September 15, 2018

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Definitions of authorize from WordNet

authorize (v.)
grant authorization or clearance for;
The rock star never authorized this slanderous biography
Synonyms: authorise / pass / clear
authorize (v.)
give or delegate power or authority to;
She authorized her assistant to sign the papers
Synonyms: empower / authorise
From wordnet.princeton.edu, not affiliated with etymonline.