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a. the business of commercial transportation by land, sea, or air
b. the freight, passengers, etc., transported
2. trade, esp of an illicit or improper kind
3. Chiefly US the number of customers patronizing a commercial establishment in a given time period
The messages transmitted and received over a communication channel.
The passage or flow of vehicles, pedestrians, ships, or planes along defined routes such as highways, sidewalks, sea lanes, or air lanes.