/
ɪmˈprɒm(p)tjuː/
adj.
&
adv.
unplanned or unrehearsed.
n.
(pl. impromptus)
a short piece of instrumental music, especially a solo, reminiscent of an improvisation.
Etymology
C17 (as adv.): from Fr., from L. in promptu ‘in readiness’, from promptus (see prompt).
