involuntary Meaning in the Cambridge English Dictionary
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Meaning of “involuntary” in the English Dictionary

"involuntary" in British English

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involuntaryadjective

uk   /ɪnˈvɒl.ən.tər.i/  us   /-ˈvɑː.lən.ter.i/
not done by ​choice; done ​unwillingly, or without the ​decision or ​intention of the ​personinvolved: A ​sharptap on the ​knee usually ​causes an involuntary ​movement of the ​lowerleg.
involuntarily
adverb uk   us   /-ˈter.əl.i/
Arthur ​shivered involuntarily as he came out of the ​building.
(Definition of involuntary from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"involuntary" in American English

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involuntaryadjective

 us   /ɪnˈvɑl·ənˌter·i/
not done ​willingly, or not done ​intentionally: A ​sharptap beneath the ​knee usually ​causes an involuntary ​movement of the ​lowerleg. The ​driver of the ​vehicle was ​charged with involuntary ​manslaughter.
(Definition of involuntary from the Cambridge Academic Content Dictionary © Cambridge University Press)

"involuntary" in Business English

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involuntaryadjective

uk   us   /ɪnˈvɒləntəri/
not done by ​choice, or not done as a ​result of someone's decision or intention: Involuntary ​unemploymentmeans that you suffer a ​totalloss of ​salary as the ​result of the ​loss of ​employment. The ​number of involuntary part-timers - ​people who couldn't get more ​hours or ​find a ​full-timejob - is ​increasing.
(Definition of involuntary from the Cambridge Business English Dictionary © Cambridge University Press)
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