Traffic vs Undefined - What's the difference?

As a noun traffic

is pedestrians or vehicles on roads, or the flux or passage thereof.

is 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.

lacking a definition or value.

(wikipedia traffic)

* traffick

(-)

Pedestrians or vehicles on roads, or the flux or passage thereof.

Traffic is slow at rush hour.

Commercial transportation or exchange of goods, or the movement of passengers or people.

* 1719 , :

I had three large axes, and abundance of hatchets (for we carried the hatchets for traffic with the Indians).

* 2007 , John Darwin, After Tamerlane , Penguin 2008, p. 12:

It's units of study are regions or oceans, long-distance trades [...], the traffic of cults and beliefs between cultures and continents.

Illegal trade or exchange of goods, often drugs.

Exchange or flux of information, messages or data, as in a computer or telephone network.

Commodities of the market.

* John Gay

You'll see a draggled damsel / From Billingsgate her fishy traffic bear.

* traffic boy * traffic jam

(traffick)

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.

To trade meanly or mercenarily; to bargain.

To exchange in traffic; to effect by a bargain or for a consideration.

(wikipedia undefined) (-)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

The result of division by zero is undefined .

* defined