Real Dictionary

merchant
countable noun: A merchant is a person who buys or sells goods in large quantities, especially one who imports and exports them.
countable noun: A merchant is a person who owns or runs a shop, store, or other business.

merchant in American English
a person whose business is buying and selling goods for profit; trader, esp. one in the wholesale trade who deals with foreign countries
of or used in trade; mercantile; commercial
to carry on trade in; deal in
adjective: pertaining to or used for trade or commerce
noun: a person who buys and sells commodities for profit; dealer; trader

merchant in British English
noun: a person engaged in the purchase and sale of commodities for profit, esp on international markets; trader
noun: Ismail (ˈɪzmeɪəl ). 1936–2005, Indian film producer, noted for his collaboration with James Ivory on such films as Shakespeare Wallah (1965), The Europeans (1979), A Room with a View (1986), The Remains of the Day (1993), and The Golden Bowl (2000)
verb: to conduct trade in; deal in

merchant in Retail
noun: A merchant is someone who owns or runs a store, or who buys and sells goods for profit.