adjective & adverb
Done without being planned, organized, or rehearsed: [as adjective]: an impromptu press conference [as adverb]: he spoke impromptu
More example sentences
- I got a phone call announcing impromptu dinner plans, so I decided to join in on that.
- Buoyed by the success of the day, we now plan to hold an impromptu New Year's eve bash here.
- Sure enough, there are bedrooms and a kitchen and even a drum set up in the entrance for impromptu rehearsals.
unrehearsed, unprepared, unscripted, extempore, extemporized, extemporaneous, improvised, spontaneous, unplanned
informal off-the-cuff, offhand, spur-of-the-moment, ad-lib