The exchange of goods or services for an amount of money or its equivalent; the act of selling, The number of items sold or the amount of money received for a number of items sold, The act of selling; also, a specific act or a continuous process of selling; the exchange or disposal of a commodity, right, property, or whatever may be the subject of bargain, for a price agreed on and generally payable in money, as distinguished from barter; the transfer of all right and property in a thing for a price to be paid in money