2 definitions by Train Man
A railroad freight yard built on an incline (appears like a hump) where cars are pushed up a hill, and roll down the otherside, where switches and retarders are thrown to put them on the correct track using gravity, instead of fuel.
by Train Man April 11, 2006
A term used on the railroads for cars that are not supposed to be humped. (See "hump yard") Commonly seen on passenger cars and tank cars.
"Do not hump" this car
by Train Man April 11, 2006