sale

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The exchange of goods or services for an amount of money or its equivalent; the act of selling.
• noun A selling of property to the highest bidder; an auction.
• noun An offer or arrangement in which goods are sold at a discount.
• noun The business or activity of selling goods or services.
• noun The number of items sold or the amount of money received for a number of items sold.
• idiom (for sale) Available to customers.
• idiom (on sale) Available to customers.
• idiom (on sale) Available to customers at a special discount.

from The Century Dictionary.

• noun Willow; osier; also, a basket-like net.
• noun 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.
• noun In law, a contract for the transfer of property from one person to another, for a valuable consideration.
• noun Opportunity to sell; demand; market.
• noun Disposal by auction or public outcry.
• noun The price.
• noun A hall.

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete See 1st sallow.
• noun The act of selling; the transfer of property, or a contract to transfer the ownership of property, from one person to another for a valuable consideration, or for a price in money.
• noun Opportunity of selling; demand; market.
• noun Public disposal to the highest bidder, or exposure of goods in market; auction.
• noun See under Bill.
• noun to be bought or sold; offered to purchasers; in the market.
• noun [Obs.] to offer for sale; to put up for purchase; to make merchandise of.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An exchange of goods or services for currency or credit.
• noun this sense?) A particular opportunity for a sale.
• noun The sale of goods at reduced prices.
• noun The act of putting up for auction to the highest bidder.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a particular instance of selling
• noun the general activity of selling
• noun an agreement (or contract) in which property is transferred from the seller (vendor) to the buyer (vendee) for a fixed price in money (paid or agreed to be paid by the buyer)
• noun an occasion (usually brief) for buying at specially reduced prices
• noun the state of being purchasable; offered or exhibited for selling