The Collaborative International Dictionary of English v.0.48:

Potpourri \Pot`pour`ri"\, n. [F., fr. pot pot + pourri, p. p. of
   pourrir to rot, L. putrere. Cf. Olla-podrida.]
   A medley or mixture. Specifically:
   (a) A ragout composed of different sorts of meats,
       vegetables, etc., cooked together.
   (b) A jar or packet of flower leaves, perfumes, and spices,
       used to scent a room.
   (c) A piece of music made up of different airs strung
       together; a medley.
   (d) A literary production composed of parts brought together
       without order or bond of connection.
       [1913 Webster]

WordNet (r) 3.0 (2006):

potpourri
    n 1: a collection containing a variety of sorts of things; "a
         great assortment of cars was on display"; "he had a variety
         of disorders"; "a veritable smorgasbord of religions" [syn:
         assortment, mixture, mixed bag, miscellany,
         miscellanea, variety, salmagundi, smorgasbord,
         potpourri, motley]
    2: a musical composition consisting of a series of songs or
       other musical pieces from various sources [syn: medley,
       potpourri, pastiche]
    3: a jar of mixed flower petals and spices used as perfume