A truck (American and Canadian English) or lorry (British English) is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power and configuration, with the smallest being mechanically similar to an automobile. Commercial trucks can be very large and powerful, and may be configured to mount specialized equipment, such as in the case of fire trucks and concrete mixers and suction excavators. Modern trucks are powered by either gasoline or diesel engines, with diesel dominant in commercial applications.

North American highway freight rig pulled by a Kenworth tractor. Note the refrigerated trailer and the Conventional ("American") engine-cab style.

Truck carrying a large load in India

Vintage 1898 NW truck