Definition of calm verb from the Oxford Advanced Learner's Dictionary

  

calm

 verb
verb
BrE BrE//kɑːm//
 
; NAmE NAmE//kɑːm//
 
Verb Forms present simple I / you / we / they calm
BrE BrE//kɑːm//
 
; NAmE NAmE//kɑːm//
 
he / she / it calms
BrE BrE//kɑːmz//
 
; NAmE NAmE//kɑːmz//
 
past simple calmed
BrE BrE//kɑːmd//
 
; NAmE NAmE//kɑːmd//
 
past participle calmed
BrE BrE//kɑːmd//
 
; NAmE NAmE//kɑːmd//
 
-ing form calming
BrE BrE//ˈkɑːmɪŋ//
 
; NAmE NAmE//ˈkɑːmɪŋ//
 
 
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 calm somebody/something to make somebody/something become quiet and more relaxed, especially after strong emotion or excitement Have some tea; it'll calm your nerves. His presence had a calming influence. see also traffic calming Word Origin late Middle English: via one of the Romance languages from Greek kauma ‘heat (of the day)’. Phrasal Verbscalm down
See the Oxford Advanced American Dictionary entry: calm