ad-lib

Ad lib refers to something that is made up as one goes along, or that is unscripted. (noun)

An example of an ad lib is an improv performance where the actors take audience suggestions and create a play as they go along.

Ad lib is the action of making something up as you go along. (verb)

An example of ad lib is coming up with a lie on the spot to avoid getting into trouble.

See ad-lib in Webster's New World College Dictionary

See ad-lib in American Heritage Dictionary 4

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