or A-O.K., A-O·kay
- Informal. OK; perfect: an A-OK rocket launching.
Origin of A-OK
First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- informal, mainly US in perfect working order; excellent
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