To compose or recite without preparation
Spoken, performed, or composed with little or no preparation or forethought
The milking cows are offered silage ad-lib and are never asked to eat right down to the last.
ad-lib hay and rug her up if it is slightly chilly.
keyboard continuo can be improvised ad lib from the score.
extemporized ad lib from a figured bass, but the music is complete with three basses.