1.Definition: buying and selling; especially illicit trade

Category: General

2.Definition: social or verbal interchange (usually followed by `with')

Category: General

3.Definition: the aggregation of things (pedestrians or vehicles) coming and going in a particular locality during a specified period of time

Category: General

4.Definition: the amount of activity over a communication system during a given period of time

"Heavy traffic overloaded the trunk lines", "Traffic on the internet is lightest during the night"

Category: General