'lagoon' definitions:

Definition of 'lagoon'

From: WordNet
noun
A body of water cut off from a larger body by a reef of sand or coral [syn: lagoon, laguna, lagune]

Definition of 'lagoon'

From: GCIDE
  • lagoon \la*goon"\ (l[.a]*g[=oo]n"), n. [It. or Sp. laguna, L. lacuna ditch, pool, pond, lacus lake. See Lake, and cf. Lacuna.] [Written also lagune.]
  • 1. A shallow sound, channel, pond, or lake, especially one into which the sea flows; as, the lagoons of Venice. [1913 Webster]
  • 2. A lake in a coral island, often occupying a large portion of its area, and usually communicating with the sea. See Atoll. [1913 Webster]
  • Lagoon island, a coral island consisting of a narrow reef encircling a lagoon. [1913 Webster] Lagophthalmia

Synonyms of 'lagoon'

From: Moby Thesaurus