V2 Vocabulary Building Dictionary
Definition: said or done without preparation, on the spot
Synonyms: spontaneous, improvised, ad lib, ad hoc, unrehearsed, extemporaneous
Antonyms: planned, rehearsed
Tips: Impromptu comes from the Latin in promptu, "at hand in readiness." A spontaneous, unprepared speech is an impromptu speech. Impromptu can also be an adverb that refers to delivering a speech without preparation and "off the cuff." Impromptu can also be a noun denoting the actual, unrehearsed speech. Impromptu and extemporaneous are synonymous. Impromptu always refers to a speech or action done or said spontaneously, without planning. Extemporaneous can refer to both an impromptu speech as well as a speech that was practiced beforehand, but delivered without notes.
Upon receiving the award, the coach made an impromptu speech to his team. (unplanned, spontaneous, unrehearsed)
Part of the debate is the impromptu question-and-answer session. (spontaneous, extemporaneous)
Could you deliver a short, impromptu toast during the cocktail hour? (unrehearsed, unplanned)
My uncle has an uncanny ability to deliver hilarious, impromptu speeches without any preparation or advanced notice. (spontaneous, unrehearsed, extemporaneous)
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