an·ti·air·craft /-ˈærˌkræft, ˈɛr-/
(a.)對付飛機的,對空的,防空的
antiaircraft
adj : designed for defense from a surface position against air
attack
n : artillery designed to shoot upward at airplanes [syn: antiaircraft
gun, flak, flack, pom-pom, ack-ack, ack-ack gun]