имя существительное [музыка] фантазия (музыкальное произведение, написанное в свободной форме)
noun Etymology: Italian, literally, fancy, from Latin phantasia — more at fancy 1. a free usually instrumental composition not in strict form 2. a. a work (as a poem or play) in which the author's fancy roves unrestricted b. something possessing grotesque, bizarre, or unreal qualities