-
Trending Now:
More Trending:
- beleaguer scaramouch non sequitur admiral's mast calumny
- ALL
lock–and–block system
noun
Definition of lock–and–block system
British
: a railway block system in which the signals permitting a train to enter a block are locked while a train is in the block and automatically unlocked as it leaves the block
Read the Latest from M-W
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:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up lock–and–block system? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!