1) a business for keeping money which is paid out when its customers write checks (bank)
2) any trick, phrase, article of clothing etc used especially by actors, advertisers, to attract attention, customers etc (gimmick)
3) a man selling goods to businesses or to customers in shops (salesman)
4) a woman selling goods to businesses or to customers in shops (saleswoman)
the business of buying and selling of goods; a particular branch of buying and selling
buying and selling