- 1a lake of salt water that is separated from the ocean by a reef or an area of rock or sand
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
- 2a small area of fresh water near a lake or river We loved to go swimming in the lagoon.
- 3(technology) an artificial area built to hold waste water before it is treated at a sewage treatment plant
Check pronunciation: lagoon