improvisation
noun/ˌɪmprəvaɪˈzeɪʃn/
/ɪmˌprɑːvəˈzeɪʃn/
[uncountable, countable]- the act of inventing music, the words in a play, a statement, etc. while you are playing or speaking, instead of planning it in advance; something that is invented in this way
- jazz improvisation
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improvisation