Source : Webster's Revised Unabridged Dictionary (1913)

Divertimento \Di*ver`ti*men"to\, n.; pl. {-ti}. [It.] (Mus.)
   A light and pleasing composition.

Source : WordNet®

divertimento
     n : a musical composition in several movements; has no fixed
         form [syn: {serenade}]
     [also: {divertimenti} (pl)]