improvisation

About 1.35 uses per million words.

Meaning

1. noun The act or art of composing and making music, poetry, and the like, extemporaneously

   He played a quick improvisation on the keyboard.

2. noun That which is improvised; an impromptu.
3. noun Musical technique, characteristic of blues music.
4. noun The act of improvising, acting or going about something without planning ahead

Similar words

extemporisation extemporization temporary expedient adlib jam makeshift spontaneity ad-libbing impromptu ad-hoc

Often followed by

and in is of on was as to that

Word family

improvisational improvisationally improvisations