fan·ta·sia 
(făn-tāzhə, -zhē-ə, făn′tə-zēə)
(făn-tāzhə, -zhē-ə, făn′tə-zēə)n.
Music
Music
1. A free composition structured according to the composer's fancy. Also called fantasy.
2. A medley of familiar themes, with variations and interludes.
[Italian, from Latin phantasia, fantasy; see FANTASY.]