from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Prompted by the occasion rather than being planned in advance: an impromptu party.
- adj. Spoken, performed, done, or composed with little or no preparation; extemporaneous: a few impromptu remarks. See Synonyms at extemporaneous.
- adv. With little or no preparation; extemporaneously.
- n. Something, such as a speech, that is made or done extemporaneously.
- n. Music A short composition, especially for the piano, performed in an offhand or extemporized style.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Improvised; without prior preparation; extemporaneous; unplanned.
- n. a short musical composition for an informal occasion often with the character of improvisation and usually to be played solo.
- n. any composition, musical or otherwise, that is created on the spot without preparation.
from the GNU version of the Collaborative International Dictionary of English
- adv. Offhand; without previous study; extemporaneous; extempore.
- n. Something made or done offhand, at the moment, or without previous study; an extemporaneous composition, address, or remark.
- n. A piece composed or played at first thought; a composition in the style of an extempore piece.
from The Century Dictionary and Cyclopedia
- Offhand; without previous study or preparation: as, a verse written impromptu.
- Prompt; offhand; extempore; extemporized for the occasion: as, an impromptu epigram.
- n. Something said or written, played, etc., at the moment, or without previous study or preparation; an extemporaneous composition or performance.
- n. In music: An extemporized composition; an improvisation.
- n. A composition in irregular form, as if extemporized; a fantasia.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an extemporaneous speech or remark
- adv. without advance preparation
- n. a short musical passage that seems to have been made spontaneously without advance preparation
- adj. with little or no preparation or forethought
French, from Latin in prōmptū, at hand : in, in; see in-2 + prōmptū, ablative of prōmptus, readiness, from past participle of prōmere, to bring forth; see prompt.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin imprōmptus ("not ready"), from im- + prōmptus ("ready, at hand"). (Wiktionary)