semi
n. countablen. a very large truck that carries goods across long distances. It is made of two parts: the engine part where the driver sits and a long trailer behind it.
n. an articulated vehicle consisting of a tractor unit and a semi-trailer. Primarily North American in usage; the term is a clipping of 'semi-trailer truck'.
A large semi blocked the narrow road.
The logistics company purchased ten new semis to handle the increased demand for cross-country shipping.
Driving a semi requires specialized training and a commercial license, as the weight and length of the vehicle significantly increase braking distances and complicate tight turns.
The prefix semi- (from Latin) used as a noun.
Commonly used in North American English; British English speakers typically use 'lorry' or 'articulated lorry'.