Definition of "ATC"

ATC

noun
plural ATCs
1. Initialism of approval to connect.
noun
uncountable
1. (aviation) Initialism of air traffic control.
2. (aviation) Initialism of air traffic controller.
3. (rail transport) Initialism of automatic train control.
noun
plural only
1. (poker) Initialism of any two (pocket) cards.
proper noun
1. Initialism of Air Training Corps (a British youth organisation sponsored by the Ministry of Defence and the Royal Air Force).
2. Initialism of Air Transport Command. (an air transport branch of the US Air Force until June 1 1948, when it was merged with the Naval Air Transport Service to create MATS).