1) v. to trade or barter property, goods and/or services for other property, goods and/or services, unlike a sale or employment in which money is paid for the property, goods or services. 2) n. the act of making a trade or barter. An exchange of "equivalent" property, including real estate, can defer capital gains taxation until the acquired property is sold. 3) n. short for "Starker" exchange of investment real property to defer capital gains tax.