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Meaning of impromptu

im•promp•tu

Pronunciation: (im-promp't, -ty), [key]
— adj.
  1. made or done without previous preparation: an impromptu address to the unexpected crowds.
  2. suddenly or hastily prepared, made, etc.: an impromptu dinner.
  3. improvised; having the character of an improvisation.
—adv.
  1. without preparation: verses written impromptu.
—n.
  1. something impromptu; an impromptu speech, musical composition, performance, etc.
  2. a character piece for piano common in the 19th century and having, despite its title, a clear-cut form.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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