impromptu

The definition of impromptu is something done without advance thought or without a plan.

(adjective)

When everyone gets together and decides to throw a party at the spur of the moment, this is an example of animpromptu party.

See impromptu in Webster's New World College Dictionary

adjective, adverb

without preparation or advance thought; offhand

Origin: Fr < L in promptu, in readiness < in, in + promptu, abl. of promptus, readiness < promptus, brought out, ready, prompt

noun

an impromptu speech, performance, etc.

See impromptu in American Heritage Dictionary 4

adjective

Prompted by the occasion rather than being planned in advance: an impromptu party.
Spoken, performed, done, or composed with little or no preparation; extemporaneous: a few impromptu remarks. See Synonyms at extemporaneous.

adverb

With little or no preparation; extemporaneously.

noun

Something, such as a speech, that is made or done extemporaneously.
Music A short composition, especially for the piano, performed in an offhand or extemporized style.

Origin:

Origin: French

Origin: , from Latin in prōmptū, at hand

Origin: : in, in; see in-²

Origin: + prōmptū

Origin: , ablative of prōmptus, readiness

Origin: , from

Origin: past participle of prōmere, to bring forth; see prompt

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impromptu in a sentence