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to ad-lib

to ad-lib

13 6.8
To say or act without preparation
  • verb
  • /ˈædˌlɪb/
: improvisar
  • During the play, the actor had to ad-lib when his co-star forgot her lines.
  • ad-libbed a line
  • ad-libbed dialogue
  • just ad-libbed

Or if you're an actor, you know, you shouldn't be ad libbing.

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Examples

  • U2's Bono took it to a new worldwide audience in 1985 when he ad-libbed parts of the lyrics at Live Aid.

    Blog text (9)
  • The last remark was ad libbed, apparently.

    Fiction book (1990)
  • But feel free to ad-lib, OK?

  • I was ad-libbing like mad.

    Fiction book (2001)
  • You know, this is all ad-libbed.

  • Pretty brave kid, coming out here and ad-libbing with me and my three writers.

  • You go out there and you improvise, you ad-lib.

  • Did you know he ad-libbed the "Here's johnny" Line in "The shining"?

  • On Dec 7, 1941, FDR ad-libbed a line.

    Blog text (31)
  • Rick slipped his prepared speech into his program folder and ad-libbed.

    Fiction book (2001)

Synonyms

to improvise
vsto ad-lib
95 4.0

Do something without planning, using what you have

is focused on speaking or performing without prior preparation
to wing it
vsto ad-lib
  • Informal
30 6.1

Do something without planning or preparation and improvise

is often used for quick unscripted lines during a performance
to lib
vsto ad-lib
  • Informal
22 9.9

To make something up during a performance when not ready

is similar but can refer to short unscripted comments too
to improv
vsto ad-lib
  • Informal
17 6.2

To perform without a script, making scenes or music on the spot

is broader, applying to unscripted speech beyond acting or music
to freestyle
vsto ad-lib
  • Informal
8 4.1

To perform music, dance, or speech without planning and make it up as you go

is used more for general unscripted speaking, not only artistic acts
to extemporize
vsto ad-lib
1 9.0

To make or do something without planning

is more casual and used for brief unscripted remarks

Antonyms

∞ 1.3

Ready to use or do something when needed

How Spontaneous

to wing it
  • Informal
30 6.1
to ad-lib
13 6.8
to read
∞ 1.0
to rehearse
264 3.5

Surface Forms

ad-lib infinitive
ad-libbed past
ad-libbed past participle
ad-libbing present participle
ad-libs third person singular

Etymology

Ad-lib comes from the Latin phrase ad libitum, which means 'as you wish' or 'at pleasure'. To ad-lib is to speak or act 'at will' without planning, so you make it up as you go and improvise.