Source : Webster's Revised Unabridged Dictionary (1913)

Coke \Coke\, n. [Perh. akin to cake, n.]
   Mineral coal charred, or depriver of its bitumen, sulphur, or
   other volatile matter by roasting in a kiln or oven, or by
   distillation, as in gas works. It is lagerly used where ?
   smokeless fire is required. [Written also {coak}.]

   {Gas coke}, the coke formed in gas retorts, as distinguished
      from that made in ovens.

Coke \Coke\, v. t.
   To convert into coke.

Source : WordNet®

coke
     n 1: carbon fuel produced by distillation of coal
     2: Coca Cola is a trademarked cola [syn: {Coca Cola}]
     3: street names for cocaine [syn: {blow}, {nose candy}, {snow},
         {C}]
     v : become coke; "petroleum oils coke after distillation"