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ad-lib

/ædˈlɪb/ · ad.lib
verb
  1. To perform without a script or preparation. The comedian ad-libbed a hilarious response to the unexpected question from the audience.
  2. To perform extemporaneously, often in response to unexpected circumstances. The actor ad-libbed the rest of the scene after forgetting her lines.
noun
  1. Alternative spelling of ad-lib. The ad-lib was a common term in theater and comedy circles.
Did you know? The term 'ad-lib' is often used in comedy and theater to describe a performer's ability to think on their feet and come up with creative responses to unexpected situations.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Aug 12, 2026