imperceptible Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
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Meaning of “imperceptible” in the English Dictionary

"imperceptible" in British English

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uk   /ˌɪm.pəˈsep.tə.bəl/  us   /ˌɪm.pɚˈsep.tə.bəl/
adverb uk   /ˌɪm.pəˈsep.tə.bli/  us   /ˌɪm.pɚˈsep.tə.bli/
Gradually, almost imperceptibly, her condition had worsened.
(Definition of imperceptible from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"imperceptible" in American English

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imperceptibleadjective [not gradable]

 us   /ˌɪm·pərˈsep·tə·bəl/
(of an action or change) so slight that it cannot be noticed: When they brought her in to the emergency room, her breathing was imperceptible.
adverb  us   /ˌɪm·pərˈsep·tə·bli/
Imperceptibly, the day grew darker.
(Definition of imperceptible from the Cambridge Academic Content Dictionary © Cambridge University Press)
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“imperceptible” in British English

“imperceptible” in American English

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