tide lock

noun

: a lock situated between an enclosed basin or a canal and the tidewater of a harbor or river when they are on different levels so that craft can pass either way at all times of the tide

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