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supersonic

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supersonic/ˌsuːpɚˈsɑːnɪk/adjective
supersonic
/ˌsuːpɚˈsɑːnɪk/
adjective
Learner's definition of SUPERSONIC  
: faster than the speed of sound

— supersonically

/ˌsuːpɚˈsɑːnɪkli/adverb
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