classification yard

(rail, US) A railroad car in which mail is carried and sorted.

A yardman is a worker assigned to a yard — a rail yard, lumber yard, or ship yard. The term is practical and workmanlike: this is the person keeping things moving, sorting stock, shunting wagons, or loading timber. In Caribbean and African American vernacular it can also simply refer to a man who works outside or maintains outdoor property.

(US) Any railway vehicle or rolling stock.

The standard American English term for any railway vehicle used to carry passengers or freight — equivalent to the British carriage or wagon. The term covers passenger cars, freight cars, tank cars, and so on. A basic vocabulary item in US railway and transportation contexts.