Source : Webster's Revised Unabridged Dictionary (1913)

Sherbet \Sher"bet\, n. [Ar. sherbet, shorbet, sharbat, properly,
   one drink or sip, a draught, beverage, from shariba to drink.
   Cf. {Sorbet}, {Sirup}, {Shrub} a drink.]
   1. A refreshing drink, common in the East, made of the juice
      of some fruit, diluted, sweetened, and flavored in various
      ways; as, orange sherbet; lemon sherbet; raspberry
      sherbet, etc.

   2. A flavored water ice.

   3. A preparation of bicarbonate of soda, tartaric acid,
      sugar, etc., variously flavored, for making an
      effervescing drink; -- called also {sherbet powder}.