1. STCA - Noun
2. STCA - Adjective
STCA (usually uncountable, plural STCAs)
(aviation) Initialism of short-term conflict alert, a system for automatically warning air traffic controllers if radar data indicates that two or more aircraft will pass dangerously-close to one another or potentially collide in flight.
STCA (not comparable)
(real estate) Initialism of subject to council approval.