Noun
A railway brake operated by condensed air.
Source: Webster's dictionaryIt is impossible to drive a train or truck with a serious leak in the air brake system. Source: Internet
A retarded bomb has a small parachute or air brake that opens to reduce the speed of the bomb to produce a safe horizontal separation between the two. Source: Internet
Philosophical Transactions Royal Society B, 267. Additionally, the rudder and air brake hypotheses do not explain why such large variation exists in crest size even among adults. Source: Internet