Difference between Ad Lib and Impromptu

AD LIB vs IMPROMPTU: NOUN

An extemporaneous speech or remark
A short musical passage that seems to have been made spontaneously without advance preparation
Something, such as a speech, that is made or done extemporaneously.
A short composition, especially for the piano, performed in an offhand or extemporized style.
Something said or written, played, etc., at the moment, or without previous study or preparation; an extemporaneous composition or performance.
In music: An extemporized composition; an improvisation.
A composition in irregular form, as if extemporized; a fantasia.
Something made or done offhand, at the moment, or without previous study; an extemporaneous composition, address, or remark.
A piece composed or played at first thought; a composition in the style of an extempore piece.
A short musical composition for an informal occasion often with the character of improvisation and usually to be played solo.
Any composition, musical or otherwise, that is created on the spot without preparation.

With little or no preparation or forethought
Prompted by the occasion rather than being planned in advance.
Spoken, performed, done, or composed with little or no preparation; extemporaneous.
Improvised; without prior preparation; extemporaneous; unplanned.

Prompt; offhand; extempore; extemporized for the occasion: as, an impromptu epigram.
Offhand; without previous study or preparation: as, a verse written impromptu.

Quip, Improv, Deadpan, Extempore, Teleprompter, Unscripted, Autocue, Monologue, Extemporaneously, Unrehearsed, Improvisation, Improvise, Ad libitum, Spontaneously, Impromptu

Interim, Unpredictable, Temporary, Hasty, Adlib, Extemporaneous, Makeshift, Spontaneous, Improvised, Informal, Spur of the moment, Ad libitum, Unprepared, Ad lib, Spontaneously

Narration, Repartee, Improvisatory, Quip, Improv, Deadpan, Extempore, Unscripted, Monologue, Extemporaneously, Unrehearsed, Improvise, Ad libitum, Spontaneously, Impromptu

Unforeseeable, Interim, Unpredictable, Temporary, Hasty, Extemporaneous, Makeshift, Spontaneous, Improvised, Informal, Spur of the moment, Ad libitum, Unprepared, Ad lib, Spontaneously

Continue to provide FARMYARD ORGANICS Calfway Pellets ad lib until target weights are reached.
Ad Lib is a decorative typeface that was designed in 1961 by Freeman Craw.
Florida Health Care Association PPENDIX EDICAL ADL activities of daily living ad lib.
Alcohol cue reactivity and ad lib drinking youngmen at risk for alcoholism.
Concerto in D minor for harpsichord or organo, flute ad lib.
Her physician had written an order for ad lib bathroom privileges.
Latin tune with ad lib solos for trombone and percussion.
Should you write a detailed script or simply ad lib?
In the original series, Martyn spoke ad lib.
INS AND OUTS: strict, routine, ad lib, etc.

Ability to cope with customers in impromptu situations.
We made an impromptu stop at Dunkin Donuts.
Day Saint Conference Excerpts, plus various impromptu subjects.
Your birthday is like an impromptu beach party.
Professor Stein begins belting out an impromptu musical.
Liverpool after performing his impromptu routines in pubs.
Several companies address their needs for training in an impromptu and indiscriminate way, training in such companies are pretty much impromptu and unsystematic.
Full Text Available Great impromptu speaking, reciting and singing are never just an isolated impromptu act.
Impromptu definition, made or done without previous preparation: an impromptu address to the unexpected crowds.
Impromptu Speeches: Students will be asked to prepare a brief impromptu speech.