Definition of "ad-libbing" []

• Present participle of ad-lib. (verb)

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• "These hosts are actors who follow scripts, so don't expect the ad-libbing acumen of Billy Crystal, but they've already got some insiders on the edge of their seats."
• "With subsidiary characters such as Madame Oglepuss a retired opera singer, Beulah Witch, and Fletcher Rabbit, the improvised puppet show became notorious for its ad-libbing."
• "If you want to hear incoherent ad-libbing, take a trip to the links I posted."