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

"improvise" in British English

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improviseverb [I or T]

uk   us   /ˈɪm.prə.vaɪz/
to ​invent or make something, such as a ​speech or a ​device, at the ​time when it is ​needed without already having ​planned it: I hadn't ​prepared a ​speech so I ​suddenly had to improvise. We improvised a ​mattress from a ​pile of ​blankets. When ​actors or ​musicians improvise, they ​perform without ​preparedspeech or ​music, making up the ​play, ​music, etc. as they ​perform it: During ​certainscenes of the ​play there isn't any ​script and the ​actors just improvise (the ​dialogue).
(Definition of improvise from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"improvise" in American English

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improviseverb [I/T]

 us   /ˈɪm·prəˌvɑɪz/
to ​invent or ​provide something at the ​time when it is ​needed without having already ​planned it: [T] We improvised a ​mattress from a ​pile of ​blankets. music To improvise ​music or ​speech is to ​invent it while you are ​performing it: [I] Hughes ​encouragesyoungactors to improvise during rehearsals.
(Definition of improvise from the Cambridge Academic Content Dictionary © Cambridge University Press)
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