The Collaborative International Dictionary of English v.0.48:

Raspberry \Rasp"ber*ry\ (r[a^]z"b[e^]r*r[y^]; 277), n. [From E.
   rasp, in allusion to the apparent roughness of the fruit.]
   (Bot.)
   (a) The thimble-shaped fruit of the Rubus Idaeus and other
       similar brambles; as, the black, the red, and the white
       raspberry.
   (b) The shrub bearing this fruit.
       [1913 Webster]

   Note: Technically, raspberries are those brambles in which
         the fruit separates readily from the core or
         receptacle, in this differing from the blackberries, in
         which the fruit is firmly attached to the receptacle.
         [1913 Webster]

WordNet (r) 3.0 (2006):

raspberry
    n 1: woody brambles bearing usually red but sometimes black or
         yellow fruits that separate from the receptacle when ripe
         and are rounder and smaller than blackberries [syn:
         raspberry, raspberry bush]
    2: red or black edible aggregate berries usually smaller than
       the related blackberries
    3: a cry or noise made to express displeasure or contempt [syn:
       boo, hoot, Bronx cheer, hiss, raspberry, razzing,
       razz, snort, bird]