the sale of commodities in small quantities or parcels; -- opposed to wholesale; sometimes, the sale of commodities at second hand.-done at retail; engaged in retailing commodities; as a retail trade; a retail grocer.-to sell in small quantities, as by the single yard, pound, gallon, etc.; to sell directly to the consumer; as, to retail cloth or groceries.-to sell at second hand.-to distribute in small portions or at second hand; to tell again or to many (what has been told or done); to report; as, to retail slander.