Definitions

1. noun

a musical composition or part that is composed extemporaneously or on the spur of the moment

“The jazz band played an impressive improviso during the concert.”

2. noun

an impromptu or unprepared performance, speech, or act

“The comedian’s improv and improviso had the audience in stitches.”

3. verb

to compose or perform music extemporaneously

“The pianist improvised a beautiful melody during the performance.”