n.1 a person or business dealing in (esp. retail) goods (contact your dealer; car-dealer; a dealer in tobacco).
2 the player dealing at cards.
3 a jobber on the Stock Exchange.
Usage:
In the UK from Oct. 1986 the name has been merged with broker (see BROKER 2, JOBBER 1).
Derivatives:
dealership n. (in sense 1).