ad-lib

Definitions of ad-lib

1. verb

   perform without preparation
   synonyms: extemporise, extemporize, improvise, improvize

   type of:

   do, execute, perform

   carry out or perform an action
2. noun

   remark made spontaneously without prior preparation
   type of:

   comment, input, remark

   a statement that expresses a personal opinion or belief or adds information
3. adjective

   said or done without having been planned or written in advance
   “he made a few ad-lib remarks”

   synonyms: spontaneous, unwritten

   unscripted

   not furnished with or using a script
4. adjective

   with little or no preparation or forethought
   “his ad-lib comments showed poor judgment”

   synonyms: extemporaneous, extemporary, extempore, impromptu, off-the-cuff, offhand, offhanded, unrehearsed

   unprepared

   without preparation; not prepared for