i Register
In some senses, a-okay is marked as colloquial. Watch for register when choosing this word.
adj
In perfect order; thoroughly acceptable.
1952, advertisement by Midvac Steels. "The Golden Age of Advertising - the 50s", p. 57, Ed. Jim Heimann, Taschen 2005. A-OK for tomorrow's missile demands.
1970, Mike Brewer and Tom Shipley, Tarkio, "Oh Mommy" It says right there in the constitution, It's really A-okay to have a revolution, When the leaders that you choose Really don't fit their shoes.
adj
Alternative letter-case form of A-okay.