Definitions

1. verb

to compose music for an instrumental work before it is performed, especially to create a harmonic structure or a theme, often as a basis for improvisation.

“The jazz band precomposed a few key melodies for their live performance.”

2. verb

to compose (something, especially a piece of music) in advance, especially for a specific use or occasion.

“The musician precomposed a few songs for the upcoming festival.”

3. noun

the act of composing music before it is performed.

“The band’s precomposition was impressive, considering their limited rehearsal time.”