brake pipe

noun

: the main pipe of a pressure brake system extending the entire length of the train and connecting the manual and the automatic actuating devices on individual vehicles

called also train line

see air brake

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now