dealer in WordNet English dictionary

1. someone who purchases and maintains an inventory of goods to be sold
   trader  bargainer  dealer  monger 
   
2. a firm engaged in trading
   dealer 
   
3. a seller of illicit goods
   "a dealer in stolen goods"
   dealer 
   
4. the person who distributes the playing cards in a card game
   dealer 
   
5. the major party to a financial transaction at a stock exchange; buys and sells for his own account
   principal  dealer