Definition of 'impromptu'
- an extemporaneous speech or remark; "a witty impromptu must not sound premeditated"
- a short musical passage that seems to have been made spontaneously without advance preparation
- with little or no preparation or forethought; "his ad-lib comments showed poor judgment"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "offhand excuses"; "trying to sound offhanded and reassuring"; "an off-the-cuff toast"; "a few unrehearsed comments"
Synonyms: ad-lib extemporaneous extemporary extempore offhand offhanded off-the-cuff unrehearsed
- without advance preparation; "he spoke ad lib"
Synonyms: ad lib ad libitum spontaneously