IMPROMPTU Synonyms: 89 Similar and Opposite Words

impromptu 1 of 3

adjective

im-ˈpräm(p)-(ˌ)tü

Definition of impromptu

as in improvised

made or done without previous thought or preparation our dinner guest thanked us with an impromptu song

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impromptu

2 of 3

noun

as in improvisation

something that is performed, made, or done without preparation although five different lines had been written, the best choice turned out to be an impromptu from the tired actor himself

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Antonyms & Near Antonyms

impromptu

3 of 3

adverb

as in spontaneously

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of impromptu

Adjective

Then Sean moves away and grows up to become a spy who, after wrapping up a mission involving smuggling a nuclear warhead for reasons unknown, decides to pay an impromptu visit to his tweenage buddies. — Alison Willmore, Vulture, 9 Oct. 2026 The impromptu opening bar scene includes friends of Claire’s from her work, her parents and brother Caleb, flown in from Dubuque. — Literary Hub, 6 Oct. 2026 There, Simone joined Little Richard for an impromptu performance. — Jason Miller, The Conversation, 1 Oct. 2026 Some do impromptu handstands against the wall, their feet tapping to the music; others migrate to adjacent gym equipment, pulsing on workout rings, swinging on knotted climbing ropes or swiveling their hips on a Bosu balance ball. — Deborah Vankin, Los Angeles Times, 29 Sep. 2026 See All Example Sentences for impromptu

Recent Examples of Synonyms for impromptu

Adjective

Stiff was a record company that was founded on about 1,000 pounds and everything was done in an improvised fashion, including what order the songs came out from different artists.

— Chris Willman, Variety, 8 Oct. 2026
The piece contends that the threat warrants advance legal planning rather than reliance on improvised responses after a disruption occurs.

— Los Angeles Times, Los Angeles Times, 27 Sep. 2026

Definition of improvised

Noun

These cocktail cars are the latest additions in a decade of Skunk Train team improvisations in the wake of long history and, more recently, trouble on the tracks.

— Los Angeles Times, Los Angeles Times, 15 Oct. 2026
Living in a world that wasn’t built with you in mind can make improvisation, adaptation, and invention part of everyday life.

— Kristen Lopez, IndieWire, 14 Oct. 2026

Definition of improvisation

Adverb

Neutrons are unstable when they’re not bound in nuclei, spontaneously spitting out lighter particles in about 15 minutes to become the slightly lighter proton.

— Cara Giovanetti, The Conversation, 25 Sep. 2026
According to this scenario, chemical reactions happened spontaneously between elements and compounds on the early Earth.

— Sarah Scoles, Scientific American, 15 Sep. 2026

Definition of spontaneously

Adjective

These findings suggest that the audience for conversations about the soul is not shrinking, but shifting away from organized religion and toward more personal, improvisational forms of seeking.

— Literary Hub, Literary Hub, 5 Oct. 2026
Last month, at the Earl Scruggs Music Festival in Western North Carolina, MGU rolled through an hour-long set of new material from Appalachian Smoke and intricate improvisational jams.

— Garret K. Woodward, Rolling Stone, 4 Oct. 2026

Definition of improvisational

Adverb

Each of the nine beauty favorites below can be haphazardly thrown from your vanity into your bag and through TSA.

— ElleAnna Revell, Condé Nast Traveler, 14 Oct. 2026
The absence of a living monarch on our money, or on our travel documents, was not an accident haphazardly arrived at but a declaration of equality meant to be flourished and displayed.

— Adam Gopnik, New Yorker, 13 Oct. 2026

Definition of haphazardly

Adverb

Lighting, of course, is all-LED, with the headlights coming with daytime running lights, with the system automatically switching between daylight running and low beam as conditions require.

— New Atlas, New Atlas, 10 Oct. 2026
But a portion also can be automatically routed into an online savings account for you.

— Jeanne Sahadi, CNN Money, 10 Oct. 2026

Definition of automatically

Adverb

Kerry McCoy’s guitar juices up a mid-song gallop by abruptly pivoting from big and noisy to compressed and snarling; at the climax, everything cuts out for a second to spotlight a Daniel Tracy drum fill.

— Patrick Lyons, Pitchfork, 13 Oct. 2026
The first preview opens with an innocent domestic exchange between a mother and daughter that abruptly transforms into something strikingly disturbing.

— Alison Foreman, IndieWire, 12 Oct. 2026

Definition of abruptly

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“Impromptu.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impromptu. Accessed 18 Oct. 2026.

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Synonyms of impromptu

adjective

noun

adverb

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