improvisation

 
Pronunciation: /ɪmprəvʌɪˈzeɪʃn/

noun

[mass noun]
  • the action of improvising: she specializes in improvisation on the piano improvisation is a performer’s greatest creative act
  • [count noun] something that is improvised, in particular a piece of music, drama, etc. created spontaneously or without preparation: free-form jazz improvisations

Derivatives

improvisational

Pronunciation: /-ˈzeɪʃ(ə)n(ə)l/
adjective