Look up ad libitum or ad lib in Wiktionary, the free dictionary.
Ad libitum, often shortened to "ad lib", denotes improvisation in various performing arts.
Ad Lib may also refer to:
- Ad Lib (album), a 1959 album by Jimmy Giuffre
- Ad Lib, Inc., a sound card manufacturer
- Ad Lib (typeface), a typeface by Freeman Craw
- The Ad Libs, an American band
- Ad Lib (TV series), American music television series
- Ad Lib (comedy show), a British comedy show