Meaning of “air brake” in the English Dictionary

british dictionary

"air brake" in British English

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air brakenoun [ C ]

uk /ˈeə ˌbreɪk/ us /ˈer ˌbreɪk/

a brake operated by air pressure, used on large vehicles such as buses and trains

(Definition of “air brake” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)