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English definition of “improvisation”

improvisation

noun [C or U] uk   /ˌɪm.prə.vaɪˈzeɪ.ʃən/ us    /ɪmˌprɑː.vɪˈ-/
a performance that an actor, musician, etc. has not practised or planned: a blues/jazz improvisation There are classes in movement, dance, and improvisation. the act of making or doing something with whatever is available at the time: I'm afraid we don't have all the necessary equipment, so a little improvisation might be required.
(Definition of improvisation from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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