10-4

APCO 10-code for "I understand your transmission"

Fairfax to car 459, we've got a 10-50 on 95 south of exit 150

10-4

by IrishRepublicanArmy May 24, 2004

10-4

10-4 means "OK," "understood," and "affirmative." Commonly known as CB radio lingo, originating from the need for brevity in radio transmission.

me--"Is anyone there?"
respondent--" 10-4"(to indicate presence).

me--"Let's roll."
respondent--"10-4"(to indicate agreement).

by Mis2y September 21, 2006

10-4

affirmative.

“Are you pulling in at the next truckstop?” “That's a big 10-4 on that.”

by Delbosco October 10, 2021

10-4

An acknowledgement

ME: Whats your location
YOU: Just crossing the bridge
ME: 10-4

by Rick Brock March 7, 2004

10-4

Understand, Affirmative, Confirmed

This is Romeo 1 to all units we have got 3 vehicles sighted at Heroin Processing, Over.
This is Kilo 2 10-4 On last, responding now, over.

by Legpain August 27, 2017

10-4

A term used in police pursuits meaning, "Understood".

"Attention all patrolling units, we have had numerous reports of a high speed street racer on the 192 East."
"Uh, have you got any more info on this call?"
"Driver is currently in a black Atom 500."
"10-4, copy that. I'll be on the lookout for this guy."

by Mitcho2001 January 20, 2016

10-4

A girl who is a 10 from far away but a 4 from up close.

"That girl over there is hot!"

"Here she comes.."

"Wait...nope...we got ourselves another 10-4."

by gdub205 October 19, 2006