Source : Webster's Revised Unabridged Dictionary (1913)

Prohibitionist \Pro`hi*bi"tion*ist\, n.
   1. One who favors prohibitory duties on foreign goods in
      commerce; a protectionist.

   2. One who favors the prohibition of the sale (or of the sale
      and manufacture) of alcoholic liquors as beverages.

Source : WordNet®

prohibitionist
     n : a reformer who opposes the use of intoxicating beverages
         [syn: {dry}]