Dreye權威釋義|impromptu

ad.

a.

n.

即興之作（如即席演說、即興演出等）[C]
a piano piece that sounds like an impromptu
一首聽上去像即興之作的鋼琴曲

同義參見:

以上來源於：《英漢大辭典》

/ɪmˈprɒm(p)tjuː/

adj.

&

adv.

unplanned or unrehearsed.

n.

(pl. impromptus)

a short piece of instrumental music, especially a solo, reminiscent of an improvisation.

C17 (as adv.): from Fr., from L. in promptu ‘in readiness’, from promptus (see prompt).

以上來源於：《簡明牛津英語詞典》