Meaning of “ultrasonic” in the English Dictionary

british dictionary

"ultrasonic" in British English

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ultrasonicadjective

uk /ˌʌl.trəˈsɒn.ɪk/ us /ˌʌl.trəˈsɑː.nɪk/

Ultrasonic sound is too high for people to hear.

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

"ultrasonic" in American English

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ultrasonicadjective [ not gradable ]

us /ˌʌl·trəˈsɑn·ɪk/

(of sound waves) too high for people to hear

(Definition of “ultrasonic” from the Cambridge Academic Content Dictionary © Cambridge University Press)