trade

the skilled practice of a practical occupation; "he learned his trade as an apprentice"
the commercial exchange (buying and selling on domestic or international markets) of goods and services; "Venice was an important center of trade with the East"; "they are accused of conspiring to constrain trade"
the business given to a commercial establishment by its customers; "even before noon there was a considerable patronage"
an equal exchange; "we had no money so we had to live by barter"
a particular instance of buying or selling; "it was a package deal"; "I had no further trade with him"; "he''s a master of the business deal"
do business; offer for sale as for one''s livelihood; "She deals in gold"; "The brothers sell shoes"
exchange or give (something) in exchange for
turn in as payment or part payment for a purchase; "trade in an old car for a new one"
engage in the trade of; "he is merchandising telephone sets"
be traded at a certain price or under certain conditions; "The stock traded around $20 a share"