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improvise

[im-pruh-vahyz]
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verb (used with object), im·pro·vised, im·pro·vis·ing.
  1. to compose and perform or deliver without previous preparation; extemporize: to improvise an acceptance speech.
  2. to compose, play, recite, or sing (verse, music, etc.) on the spur of the moment.
  3. to make, provide, or arrange from whatever materials are readily available: We improvised a dinner from yesterday's leftovers.
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verb (used without object), im·pro·vised, im·pro·vis·ing.
  1. to compose, utter, execute, or arrange anything extemporaneously: When the actor forgot his lines he had to improvise.
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Origin of improvise

1820–30; < French improviser, or its source, Italian improvisare (later improvvisare), verbal derivative of improviso improvised < Latin imprōvīsus, equivalent to im- im-2 + prōvīsus past participle of prōvidēre to see beforehand, prepare, provide for (a future circumstance). See proviso
Related formsim·pro·vis·er, im·pro·vi·sor, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for improviser

improvise

verb
  1. to perform or make quickly from materials and sources available, without previous planning
  2. to perform (a poem, play, piece of music, etc), composing as one goes along
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Derived Formsimproviser, noun

Word Origin

C19: from French, from Italian improvvisare, from Latin imprōvīsus unforeseen, from im- (not) + prōvīsus, from prōvidēre to foresee; see provide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for improviser

improvise

v.

1826, back-formation from improvisation, or else from French improviser (17c.), from Italian improvisare "to sing or speak extempore," from improviso, from Latin improvisus "unforeseen, unexpected" (see improvisation). Or possibly a back-formation from improvisation. Related: Improvised; improvising.

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Online Etymology Dictionary, © 2010 Douglas Harper