impromptu: Meaning and Definition of
im•promp•tu
Pronunciation: (im-promp't, -ty), [key] — adj.
- made or done without previous preparation: an impromptu address to the unexpected crowds.
- suddenly or hastily prepared, made, etc.: an impromptu dinner.
- improvised; having the character of an improvisation.
—adv. - without preparation: verses written impromptu.
—n. - something impromptu; an impromptu speech, musical composition, performance, etc.
- 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.