Intercourse by way of trade and traffic between different peoples or states and the citizens or inhabitants there-of, including not only the purchase, sale, and exchange of commodities, but also the ln-strumentallties and agencles hy whlch it is promoted and the means and appllances by which It is carried on, and the transporta-tion of persons as well as of goods, both by land and by sea. Brennan v. Titusville, 153
Source: Black's Law Dictionary 2nd Ed (1910)
