• noun:   remark made spontaneously without prior preparation

  Example: "His ad-libs got him in trouble with the politicians"

• verb:   perform without preparation
• adjective:   with little or no preparation or forethought

  Example: "His ad-lib comments showed poor judgment"

• adjective:   said or done without having been planned or written in advance

  Example: "He made a few ad-lib remarks"

Related words...