Main Entry: ¹im·promp·tu

Pronunciation: \im-ˈpräm(p)-(ˌ)tü, -(ˌ)tyü\

Function: noun

Etymology: French, from impromptu extemporaneously, from Latin in promptu in readiness

Date: 1683

1 : something that is impromptu
2 : a musical composition suggesting improvisation