traffic

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The passage of people or vehicles along routes of transportation.
• noun Vehicles or pedestrians in transit.
• noun The commercial exchange of goods; trade.
• noun Illegal or improper commercial activity: synonym: business.
• noun The business of moving passengers and cargo through a transportation system.
• noun The amount of cargo or number of passengers conveyed.
• noun The conveyance of messages or data through a system of communication.
• noun Messages or data conveyed through such a system.
• noun Social or verbal exchange; communication.
• intransitive verb To carry on trade or other dealings.

from The Century Dictionary.

• To trade; pass goods and commodities from one person to another for an equivalent in goods or money; buy and sell wares or commodities; carry on commerce.
• To deal; have business or dealings.
• To exchange in traffic; barter, or buy and sell.
• To bargain; negotiate; arrange.
• noun An interchange of goods, merchandise, or property of any kind between countries, communities, or individuals; trade; commerce.
• noun The coming and going of persons or the transportation of goods along a line of travel, as on a road, railway, canal, or steamship route.
• noun Hence The persons or goods, collectively, passing or carried along a route or routes.
• noun Dealings; intercourse.
• noun A piece of business; a transaction.
• noun The subject of traffic; commodities marketed.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To exchange in traffic; to effect by a bargain or for a consideration.
• noun Commerce, either by barter or by buying and selling; interchange of goods and commodities; trade.
• noun rare Commodities of the market.
• noun The business done upon a railway, steamboat line, etc., with reference to the number of passengers or the amount of freight carried.
• noun a periodical statement of the receipts for goods and passengers, as on a railway line.
• noun a computer of the returns of traffic on a railway, steamboat line, etc.
• intransitive verb To pass goods and commodities from one person to another for an equivalent in goods or money; to buy or sell goods; to barter; to trade.
• intransitive verb To trade meanly or mercenarily; to bargain.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Pedestrians or vehicles on roads, or the flux or passage thereof.
• noun Commercial transportation or exchange of goods, or the movement of passengers or people.
• noun Illegal trade or exchange of goods, often drugs.
• noun Exchange or flux of information, messages or data, as in a computer or telephone network.
• verb intransitive To pass goods and commodities from one person to another for an equivalent in goods or money; to buy or sell goods; to barter; to trade.
• verb intransitive To trade meanly or mercenarily; to bargain.
• verb transitive To exchange in traffic; to effect by a bargain or for a consideration.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the amount of activity over a communication system during a given period of time
• 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
• noun buying and selling; especially illicit trade
• verb deal illegally
• noun social or verbal interchange (usually followed by `with')