or A-O.K., A-O·kay

See more synonyms for A-OK on Thesaurus.com

Origin of A-OK

First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for aok



  1. informal, mainly US in perfect working order; excellent

Word Origin for A-OK

C20: from a (ll systems) OK
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for aok


1961, said to be an abbreviation of all (systems) OK; popularized in the jargon of U.S. astronauts. See OK.

Online Etymology Dictionary, © 2010 Douglas Harper