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English definition of “traffic”

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traffic

noun [U] uk   /ˈtræf.ɪk/ us  

traffic noun [U] (VEHICLES)

A2 the number of vehicles moving along roads, or the amount of aircraft, trains, or ships moving along a route: There was heavy/a lot of traffic on the roads this morning. We got stuck in traffic for several hours. New measures have been introduced to try and ease traffic congestion in the city. Five people were injured in a traffic accident (= one involving vehicles). Air traffic has increased 30 percent in the last decade. people or goods transported by road, air, train, or ship, as a business: The airline halved its overseas service because of a sharp reduction in traffic. Environmental groups want more passenger and freight traffic moved off the roads and onto trains.
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traffic noun [U] (TRADE)

illegal trade: to cut down the traffic in drugs/the drug traffic Police are looking for ways of curbing the traffic in guns.

traffic

verb [I] uk   /ˈtræf.ɪk/ ( present participle trafficking, past tense and past participle trafficked) us  
to buy and sell goods illegally: They were arrested for trafficking in the eggs of protected species of birds.
trafficking
noun [U] uk   /-ɪ.kɪŋ/ us  
arms/drugs trafficking
(Definition of traffic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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