train line

noun

Definition of train line

1 : a continuous electric control circuit used on electric trains of two or more motor-driven cars for controlling the motors on the rear cars from the master controller in the cab of the first car

2 or train pipe : brake pipe

There's more!

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with: