Definition of Ad-lib
to make something up as you go along, typically in a performance
Examples of Ad-lib in a sentence
Hannah completely forgot the speech she had prepared for class, so she had no choice but to ad-lib it and hope for the best.
Personally I find comedians that can ad-lib on stage much funnier than the ones who try to memorize a routine prior to performing.
The actor decided to ad-lib when he forgot his lines during a scene, but they were so good that the director kept them instead.
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