impromptu

1 of 2

adjective

im·​promp·​tu im-ˈpräm(p)-(ˌ)tü 

-(ˌ)tyü

1

: made, done, or formed on or as if on the spur of the moment : improvised

had an impromptu party

2

: composed or uttered without previous preparation : extemporaneous

impromptu remarks

impromptu adverb

impromptu

2 of 2

noun

1

: something that is impromptu

2

: a musical composition suggesting improvisation

Did you know?

Impromptu most often describes things, such as speeches or gatherings, that are not prepared ahead of time but that instead happen spontaneously. An impromptu concert or photoshoot, for example, is conceived and executed in the moment. Impromptu was borrowed—spelling, meaning, and all—from French in the mid-18th century. The French had gotten the word from Latin, from the phrase in promptu, meaning “in readiness.” But the presence of prompt in there is no coincidence: both impromptu and prompt are ultimately derived from the Latin promere, meaning “to bring forth, take out.”

Synonyms of impromptu

Adjective

• improvised
• improvisational

Noun

• improvisation

Examples of impromptu in a Sentence

Adjective

Two of my friends came by unexpectedly, and we had an impromptu little party in my kitchen.

He made an impromptu speech about honor and responsibility.

Noun

although five different lines had been written, the best choice turned out to be an impromptu from the tired actor himself

Recent Examples on the Web

Adjective

Organized by a slew of leading Japanese menswear companies, the event — now in its seventh iteration — is a city stroll-cum-impromptu-runway show of men decked out in full sartorial looks that has already taken place in Tokyo, Osaka and Seoul, among other cities. —Martino Carrera, Footwear News, 5 Nov. 2025

Dreyer learned of the award on Friday, when SDFC’s players and staff surprised him with the trophy in an impromptu ceremony. —Ryan Finley, San Diego Union-Tribune, 4 Nov. 2025

There’s a Redwall vibe to the third installment, as fan-favorite rattkin Fern gets carried away on an impromptu adventure involving a chaos-goblin who holds a bounty tempting enough for all the ne’er-do-wells to try and collect on. —Literary Hub, 3 Nov. 2025

From impromptu community food banks to free corporate deliveries, Arizonans who are going without food stamps can find support within their communities. —Rey Covarrubias Jr, AZCentral.com, 3 Nov. 2025

Word History

Etymology

Noun

French, from impromptu extemporaneously, from Latin in promptu in readiness

First Known Use

Adjective

1764, in the meaning defined at sense 1

Noun

1683, in the meaning defined at sense 1

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Kids Definition

impromptu

adjective

im·​promp·​tu

im-ˈpräm(p)-t(y)ü

: not prepared ahead of time : extemporaneous

an impromptu speech

impromptu adverb or noun