trader

noun

1. a person who trades; a merchant or businessperson.
2. a ship used in trade, especially foreign trade.
3. a member of a stock exchange trading privately and not on behalf of customers.

noun

1. a person who engages in trade; dealer; merchant
2. a vessel regularly employed in foreign or coastal trade
3. stock exchange, US a member who operates mainly on his or her own account rather than for customers’ accounts