ad-lib (third-person singular simple present ad-libs, present participle ad-libbing, simple past and past participle ad-libbed)
1.to improvise all or part of (a speech, a piece of music, etc.), to ad-lib one's lines.
2.to act, speak, etc., without preparation, Throughout the play he had to ad-lib constantly.
3.impromptu; extemporaneous, ad-lib remarks to hecklers.
1.something improvised in speech, music, etc., Was that joke part of your speech or an ad lib?
2.at one's pleasure; without restriction.
3.freely; as needed; without stint, Water can be given to the patients ad lib.
1. to improvise and deliver without preparation (a speech, musical performance, etc) adjective (ad lib when predicative)
2. improvised; impromptu adverb
3. without restraint; freely
4. (music) short for ad libitum noun
5. an improvised performance, often humorous Derived Formsad-libber, noun Word OriginC18, short for Latin ad libitum, literally, according to pleasureCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollinsPublishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source
1811, shortened from Latin ad libitum "at one's pleasure, as much as one likes" (c.1600), from libere "to please" (see libido). First recorded as one word 1919 (v.), 1925 (n.).
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