Source : Webster's Revised Unabridged Dictionary (1913)

Hasheesh \Hash"eesh\, Hashish \Hash"ish\, n. [Ar. hash[=i]sh.]
   A slightly acrid gum resin produced by the common hemp
   ({Cannabis saltiva}), of the variety Indica, when cultivated
   in a warm climate; also, the tops of the plant, from which
   the resinous product is obtained. It is narcotic, and has
   long been used in the East for its intoxicating effect. See
   {Bhang}, and {Ganja}.

Source : WordNet®

hashish
     n : purified resinous extract of the hemp plant; used as a
         hallucinogen [syn: {hasheesh}, {haschisch}, {hash}]