n (1)路上来往的车辆，交通(vehicles，persons，etc moving in an area along a road or street，etc)[U]：～congestion 交通拥挤;London-bound/heavy/light～开往伦敦的车辆/拥挤的交通/路上行人车辆不多;air～空中交通;～accidents/policemen/regulations/problems交通事故/警察/规则/问题;～indicator/island/light/jam/warden 方向灯/安全岛/交通灯/交通堵塞/交通管理员;There was little～on the highway in the early morning. 清晨公路上没有什么车辆。You must always watch out for the～here. 这里你必须注意来往的车辆。Vehicular～is heavy during the rush hour. 上下班高峰期间，车流量很大。

(2)运输，行驶，车辆行人的来往(movement of vehicles and people along roads and streets，of ships on the sea，aircraft in the sky，etc)[U]：regulate/control the～管理/控制车辆的来往;the cross-channel/goods～横渡海峡的航行/货物运输;air-～controllers 空中交通管制人员;ships of～来往的船只;

(3)货(客)运量(amount of cargo or number of passengers conveyed)[U]：an increase in passenger/goods/freight～旅客/货物/货物运输量的增加;The nine o'clock flight to Washington carries a lot of～. 9点钟飞往华盛顿的航班载客很多。〖同〗passengers，travelers，riders，freight;

(4)违(非)法买卖(illegal or improper commercial activity)[U][N(in)]：suppress (eliminate) the illegal～in drugs/narcotics/stolen goods/arms/white slaves/the furs of rare animals 镇压(消灭)毒品/麻醉品/赃物/武器/逼良为娼/稀有动物毛皮的非法交易;〖同〗smuggling，dealings;

have no traffic with和……不交往：I should have no～with a person of his reputation，if I were you. 我要是你，就不会跟有他那种名声的人交往。

vi (不道德、非法的)买卖(trade or deal in a specific commodity or service，often of an illegal nature)[I，I+prep (in)]：～in stolen goods/smuggled goods/illicit liquor/guns 从事偷盗物品/走私货/违禁酒/枪支的非法买卖;drug trafficking 毒品买卖;〖同〗trade，deal，smuggle;

→′trafficker n 非法买卖者;

【辨异】traffic与commerce和trade的区别见COMMERCE。