ultrasonic Definition in the Cambridge English Dictionary
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Definition of “ultrasonic” - English Dictionary

Definition of "ultrasonic" - American English Dictionary

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ultrasonicadjective [not gradable]

 us   /ˌʌl·trəˈsɑn·ɪk/
(of ​soundwaves) too high for ​people to ​hear
(Definition of ultrasonic from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "ultrasonic" - British English Dictionary

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ultrasonicadjective

uk   /ˌʌl.trəˈsɒn.ɪk/  us   /-ˈsɑː.nɪk/
Ultrasonic ​sound is too high for ​people to ​hear.
(Definition of ultrasonic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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