Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “lock”

lock

noun [C] (WATER)   /lɑk/
a length of water with gates at either end where the level of water can be changed to allow boats to move between parts of a canal or river that are at different heights
(Definition of lock noun (WATER) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of lock

Browse related topics

You are looking at an entry to do with Parts of watercourses, but you might be interested in these topics from the Seas, rivers & water topic area:

Definitions of “lock” in other dictionaries

Word of the Day

gastronomy

the art and knowledge involved in preparing and eating good food

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More