impromptu
/ɪmˈprɒm(p)tjuː
/adjective & adverb
Done without being planned or rehearsed: [as adjective]: an impromptu press conference [as adverb]: he spoke impromptu...
- 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.
Synonyms
unrehearsed, unprepared, unscripted, extempore, extemporized, improvised, improvisational, improvisatory, improvisatorial, spontaneous, unstudied, unpremeditated, unarranged, unplanned, on the spot, snap, ad lib;
ad hoc, thrown together, cobbled together, rough and ready;
Latin ad libitum
informal off-the-cuff, spur-of-the-moment
rare extemporaneous
extempore, spontaneously, without preparation, without rehearsal, on the spur of the moment, offhand, ad lib;
Latin ad libitum
informal off the cuff, off the top of one's head
rare extemporaneously
noun (plural impromptus)
A short piece of instrumental music, especially a solo, that is reminiscent of an improvisation.
Origin
Mid 17th century (as an adverb): from French, from Latin in promptu 'in readiness', from promptus (see prompt).