Definition of sonic adjective from the Oxford Advanced Learner's Dictionary

 

sonic

 adjective
adjective
BrE BrE//ˈsɒnɪk//
 
; NAmE NAmE//ˈsɑːnɪk//
 
(specialist)
 
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connected with sound or the speed of sound sonic waves Word Origin 1920s: from Latin sonus ‘sound’ + -ic.
See the Oxford Advanced American Dictionary entry: sonic

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