polished improvisation is drama is where a cast in a improvisation game for example has time to create a storyline or something like that before they go on the stage. Which means they have little time to come up with something and they can rehearse a couple of minutes before they go on the stage.
Improvisation means to make it up as you go without planning it ahead of time
Rhythmic improvisation
Prepared and spontaneous
Collective Improvisation.
Scat singing
no, polished is either the past tense of the verb to polish, e.g. he polished the table; or an adjective, meaning cultured, refined, outstanding, e.g. the soprano gave a polished performance.
Improvisation means to make it up as you go without planning it ahead of time
Improvisation 35 was painted in 1914.
Solo Improvisation.
Improvisation
Rhythmic improvisation
melodic improvisation
Prepared and spontaneous
Collective Improvisation.
Scat singing
Spontaneous improvisation is making something interesting up on the spot.
When you think of something out of the blue and plan it ahead so it is 'planned improvisation'.