Definition of automatic block signal
: a railroad signal at the entrance of a block actuated automatically by and governing the movement of trains entering and using the block
Test Your Vocabulary
Eponyms: Words Named After People
-
- What is the best definition of boycott?

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share automatic block signal