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Adjective: ad-lib  ad lib
  1. With little or no preparation or forethought
    "his ad-lib comments showed poor judgment";
    - extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff, unrehearsed
  2. Said or done without having been planned or written in advance
    "he made a few ad-lib remarks";
    - spontaneous, unwritten
Noun: ad-lib  ad lib
  1. Remark made spontaneously without prior preparation
    "his ad-libs got him in trouble with the politicians"
Verb: ad-lib (ad-libbed,ad-libbing)  ad lib
  1. Perform without preparation
    "he ad-libbed a speech at the wedding";
    - improvise, improvize [non-standard], extemporize, extemporise [Brit], wing it [informal], wing [informal]
Adverb: ad lib  ad lib
  1. Without advance preparation
    "he spoke ad lib";
    - ad libitum, spontaneously, impromptu

Derived forms: ad-libbed, ad-libbing, ad-libs

See also: unprepared, unscripted

Type of: comment, do, execute, input, perform, remark

Encyclopedia: Ad-lib

Ad lib