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impromptu

im·promp·tu

impromptu

 
pronunciation:
ihm pramp tu
parts of speech:
adjective, adverb, noun
part of speech: adjective
definition: thought of, made, or done without plan, preparation, or practice; spontaneous or improvised.
an impromptu performance at the piano
synonyms:
ad-lib, extemporaneous, extemporized, spontaneous, unplanned, unpremeditated, unprepared
antonyms:
prepared, prepared, rehearsed
similar words:
candid, improvised, impulsive, offhand, unrehearsed
 
part of speech: adverb
definition: without advance plan or preparation; spontaneously.
He lectured impromptu for an hour.
synonyms:
extemporaneously, extemporarily, spontaneously, unpreparedly
similar words:
ad lib, offhand
 
part of speech: noun
definition: a short musical composition, esp. for the piano, that seems like an improvisation.
similar words:
improvisation