Definition of sentry board
1 : a platform for a sentry outside the gangway
2 : a board hung near a sentry post for posting instructions and orders
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!
Origin and Etymology of sentry board
Seen and Heard
What made you want to look up sentry board? Please tell us where you read or heard it (including the quote, if possible).