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Related to ad-lib: ad libitum feeding
1. adjective Of or characterized by an impromptu fashion, with little or no preparation beforehand. Jazz improv is always a bit ad-lib by design; you can't plan what you might play! When you surrender to creativity, you can't predict what will happen—you naturally become more ad-lib. No, I don't sketch anything out in advance. My paintings are always fairly ad-lib.
2. adverb Done in an impromptu or free-hand fashion, with little or no preparation beforehand. His comedy is always so unique; I hear he does the whole thing ad-lib. What did I even say when I was up on stage? I gave the whole introduction basically ad-lib! Sir, with all due respect, you can't do this speech ad-lib—it's far too important!
3. noun Something, usually performative in nature, that is done with little or no preparation beforehand. His speech this morning felt like it was a bit of an ad-lib. I don't think he prepared any notes ahead of time. Come on, your professor will know if your presentation is a total ad-lib. I know his remarks weren't an ad-lib because he gets terrible stage fright and needs cue cards at all times.
4. verb To say, do, or perform something in an impromptu fashion, with little or no preparation beforehand. I had forgotten to rehearse my lines for the audition, so I just decided to ad-lib the whole way through. I get so nervous when I do a presentation that I end up ad-libbing, rather than sticking to my text. I wish you wouldn't ad-lib like that when we go off-book. It throws off the other actors who aren't as confident with their lines.
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