lagoon
n. countable B2 Upper Intermediate US //ɫəˈɡun// UK //lɐɡˈuːn// la·goon
n. a pool of salt water that is separated from the ocean by a sandbank or a coral reef.
n. a shallow body of water separated from a larger body of water by barrier islands or reefs.
The water in the lagoon is very clear and calm.
Tourists often take small boats out to the lagoon to see the colorful fish living in the shallow water.
The resort was built around a natural lagoon, providing guests with a sheltered swimming area protected from the heavy surf of the open ocean.
Borrowed from French lagune, from Italian laguna, from Latin lacuna. Related to Old English lagu via Proto-Indo-European. Doublet of lacuna and lacune.
Usage
Often used with the definite article when referring to a specific geographical feature.