impromptu

American  

[im-promp-too, -tyoo] / ɪmˈprɒmp tu, -tju /

adjective

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.

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adverb

1. without preparation.

   verses written impromptu.

noun

• impromptus
  plural

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.

impromptu British  

/ ɪmˈprɒmptjuː /

adjective

1. unrehearsed; spontaneous; extempore

2. produced or done without care or planning; improvised

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adverb

1. in a spontaneous or improvised way

   he spoke impromptu

noun

1. something that is impromptu

2. a short piece of instrumental music, sometimes improvisatory in character

Synonym Usage

See extemporaneous.

Other Word Forms

Noun Inflected Forms

• impromptus
  plural

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Etymology

Origin of impromptu

First recorded in 1660–70; from French, from Latin in promptū “in readiness”; see in, prompt

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Explanation

Some of the best kinds of parties are impromptu ones, when you decide at the last minute to get together. The adjective impromptu describes things done or said without previous thought or preparation. Impromptu is also used as an adverb: Most people are not able to speak impromptu in front of an audience. This word was borrowed from French and ultimately derives from the Latin in prōmptū ("at hand, in readiness") from in ("in") plus a form of prōmptus ("readiness"). As you can guess from the spelling, the adjective and verb prompt are related to impromptu; they are from the same Latin verb, prōmere, "to bring forth."

Example Sentences

See Examples For:

impromptu impromptus

The Bolton comedian's impromptu appearance was reminiscent of when he famously interrupted the late Dianne Oxberry's forecast in 2011, and declared she "made it sunshine for everybody".

From BBC ● Aug. 26, 2026

At an impromptu press conference last week, US President Donald Trump waxed lyrical about his helipad, his ballroom and his granite paving stones.

From Barron's ● Aug. 25, 2026

Kasten is a busy man, and there’s seemingly no way he holds even an impromptu meeting with reporters about a possible sale if that “period” wasn’t a “question mark.”

From Los Angeles Times ● Aug. 24, 2026

The social media age — sometimes dubbed Web 2.0 to distinguish it from the less openly interactive earlier era of the internet — seemed to supercharge this impromptu rezoning of the information superhighway.

From Salon ● Aug. 23, 2026

The impromptu encounter with Jasmine had felt healing, but Debbie didn’t have any desire for another meeting.

From "The 57 Bus" by Dashka Slater

For the first half, he joined three otherworldly impromptus — Drei Klavierstücke, Opus 946 — written in Schubert’s last months with the Third Sonata by the neglected Soviet composer Dmitri Kabalevsky.

From Los Angeles Times ● Jan. 29, 2025

For the occasion Mr. Lubimov looked at the forward end of the fortepiano repertory, beginning and ending with late Beethoven sonatas and offering a Glinka rarity and a pair of Schubert impromptus between them.

From New York Times ● Mar. 28, 2012

Chopin's four impromptus, often dismissed as salon pieces and rarely played as a group, completed an uncommonly interesting programme.

From The Guardian ● Dec. 3, 2010

Mr. Kissin performs four polonaises and four impromptus with his customary crystalline technique, singing tone and generous rubato.

From New York Times ● May 27, 2010

He disliked mere disquisitions in Edinburgh, and prepared impromptus in London; and puzzled the promoters of such things sometimes by placid silence, sometimes by broad merriment.

From Memoirs of the Life of Sir Walter Scott, Volume V (of 10) by J. G. (John Gibson) Lockhart

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Related Words

• offhand
• spontaneous
• unscripted

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