Definition of "Traffic" :

noun: social or verbal interchange (usually followed by with')

noun: buying and selling; especially illicit trade

noun: the amount of activity over a communication system during a given period of time

"Heavy traffic overloaded the trunk lines."

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

verb: trade or deal a commodity

"They trafficked with us for gold."

verb: deal illegally

"Traffic drugs."