American English

Definition of belay verb from the Oxford Advanced American Dictionary

 

belay

 verb
verb [intransitive, transitive] belay (something/somebody) (technology)Verb Forms present simple I / you / we / they belay
 
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he / she / it belays
 
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past simple belayed
 
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-ing form belaying
 
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(in climbing) to attach a rope to a rock, etc.; to make a person safe while climbing by attaching a rope to the person and to a rock
See the Oxford Advanced Learner's Dictionary entry: belay