impromptu (noun)

an extemporaneous speech or remark

"a witty impromptu must not sound premeditated"

impromptu (adj)

a short musical passage that seems to have been made spontaneously without advance preparation

ad-lib, extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff, unrehearsed (adverb)

with little or no preparation or forethought

"his ad-lib comments showed poor judgment"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "offhand excuses"; "trying to sound offhanded and reassuring"; "an off-the-cuff toast"; "a few unrehearsed comments"

ad lib, ad libitum, spontaneously, impromptu (adverb)

without advance preparation

"he spoke ad lib"

impromptu (Noun)

a short musical composition for an informal occasion often with the character of improvisation and usually to be played solo.

impromptu (Noun)

any composition, musical or otherwise, that is created on the spot without preparation.

impromptu (Adjective)

Improvised; without prior preparation; extemporaneous; unplanned.

Impromptu

An impromptu is a free-form musical composition with the character of an ex tempore improvisation as if prompted by the spirit of the moment, usually for a solo instrument, such as piano. The first recorded use of the term impromptu in this sense occurred in 1817, in the Allgemeine musikalische Zeitung, an idea of the publisher to describe a piano piece by Jan Václav Voříšek.

Impromptu

An impromptu (, French: [ɛ̃pʁɔ̃pty], loosely meaning "offhand") is a free-form musical composition with the character of an ex tempore improvisation as if prompted by the spirit of the moment, usually for a solo instrument, such as piano. According to Allgemeine musikalische Zeitung, Johann Baptist Cramer began publishing piano pieces under the (sub-)title of "impromptu." (AMZ, Mar. No II, 1815, col. 6), which seems to be the first recorded use of the term impromptu in this sense.