Real Dictionary

barter
verb: If you barter goods, you exchange them for other goods, rather than selling them for money.

barter in American English
to give (goods or services) in return for other goods or services; trade
to trade by exchanging goods or services without using money
intransitive verb: to trade by exchange of commodities rather than by the use of money
noun: the act or practice of bartering
transitive verb: to exchange in trade, as one commodity for another; trade

barter in British English
noun: trade by the exchange of goods
verb: to trade (goods, services, etc) in exchange for other goods, services, etc, rather than for money