Webster's English Dictionary

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coke

1. coke \'ko-k\ n [ME; akin to Sw ka:lk pith, Gk gelgis bulb of garlic] : 
   the residue of coal left after destructive distillation and used as fuel ; 
   also : a similar residue left by other materials (as petroleum) distilled 
   to dryness
2. coke vt : to change into coke to become coked 
3. coke n [by shortening & alter.] slang  : COCAINE