An impromptu, in music, is a piece that was unplanned for (usually suddenly inspired by something).
Impromptu in general means "unplanned for."
The origin of the word impromptu is french. The definition is having no preparation.
something that is done on the spur of the moment
Fantaisie Impromptu
Impromptu is an adjective.
Chopin Impromptu #4 (Fantasie Impromptu) is by far the hardest one. That song is related to Beethoven Moonlight Sonata 3rd movement. Other than Fantasie Impromptu, the most difficult is Chopin Impromptu #3. #1 is the easiest. Impromptu #2 is more beautiful than #1/#3. Fantasie Impromptu is also by far the most beautiful one. Impromptu #3 is slightly more beautiful than Impromptu #1. No offense to Impromptu #1.
The antonym for impromptu is planned or rehearsed.
Impromptu acting is acting at the spur of the moment.
It is something that is made or done without previous preparation. An impromptu dinner is hastily prepared. An impromptu speech that was off the cuff and unprepared. An impromptu address to unexpected crowds
She delivered an impromptu speech at the event, showcasing her ability to think on her feet.
advantages and disadvantages of Impromptu presentation
Your impromptu adlibs are NOT appreciated as you keep STEALING THE SCENE! The impromptu picnic was held sans ants.
"Impromptu" can refer to something done without preparation or rehearsal, as in an impromptu speech. It can also be used figuratively to describe something spontaneous or unplanned, like an impromptu gathering.