Impromptu Definition

ĭm-prŏmpto͝o, -tyo͝o
adjective
Without preparation or advance thought; offhand.
Webster's New World
Spoken, performed, done, or composed with little or no preparation; extemporaneous.
A few impromptu remarks.
American Heritage
Antonyms:
adverb
With little or no preparation; extemporaneously.
American Heritage
Synonyms:
noun
Something, such as a speech, that is made or done extemporaneously.
American Heritage
An impromptu speech, performance, etc.
Webster's New World
A short composition, especially for the piano, performed in an offhand or extemporized style.
American Heritage
Any composition, musical or otherwise, that is created on the spot without preparation.
Wiktionary
Synonyms:
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Other Word Forms of Impromptu

Noun

Singular:
impromptu
Plural:
impromptus

Origin of Impromptu

  • French from Latin in prōmptū at hand in in in–2 prōmptū ablative of prōmptus readiness from past participle of prōmere to bring forth prompt

    From American Heritage Dictionary of the English Language, 5th Edition

  • Borrowing from French impromptu

    From Wiktionary

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