Commerce: The exchange of goods and services, esp. on a large scale involving transportation between cities, states and nations.
Interstate Commerce: Trade and other business activities between those located in different states; esp. traffic in goods and travel of people between states.
Intrastate Commerce: Commerce that begins and ends entirely within the borders of a single state
Commercial Law: The substantive law dealing with the sale of goods, the financing of credit transactions on the security of the goods sold, and negotiable instruments. *Most American commercial law is governed by the Uniform Commercial Code. — Also termed mercantile law