Dictionary
ad lib
Pronunciation: (ad lib', ad'), [key]1. something improvised in speech, music, etc.:
Was that joke part of your speech or an ad lib?
2. at one's pleasure; without restriction.
3. freely; as needed; without stint:
Water can be given to the patients ad lib. ad-lib
Pronunciation: (ad lib', ad'-), [key]
—v., -libbed, -lib•bing,
—adj.
—
v.t.
to improvise all or part of (a speech, a piece of music, etc.):
to ad-lib one's lines.
—
v.i.
to act, speak, etc., without preparation:
Throughout the play he had to ad-lib constantly.
—
adj.
impromptu; extemporaneous:
ad-lib remarks to hecklers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.