Commerce

[Lat. comm^cium, from con, together, and mercari, to trade, from m^rx, merchandise.] In a strict sense, traffic in merchandise. In a general sense, an interchange or mutual change of goods, wares, productions or property of any kind, between nations or individuals, either by barter, or by purchase and sale.

Webster.

Commerce is made by Webster and others the synonyme of trade, and divided into foreign and inland. A distinction, however, is frequently made between commerce and trade properly so called: the former term being used to denote intercourse with foreign nations; the latter, intercourse between citizens or subjects of the same nation. Wharton's Lex. Holthouse, The term commerce, as used in the constitution of the United States, (Art. I. Sect.