| Lagoon 1. (n.) A shallow sound, channel, pond, or lake, especially one into which the sea flows; as, the lagoons of Venice. 2. (n.) A lake in a coral island, often occupying a large portion of its area, and usually communicating with the sea. See Atoll. Thesaurus Entries artificial lake, bayou lake, cistern, dam, dead water, dike, etang, farm pond, fishpond, freshwater lake, glacial lake, inland sea, laguna, lake, lakelet, landlocked water, linn, loch, lough, mere, millpond, millpool, nyanza, oxbow lake, plash, pond, pondlet, pool, puddle, reservoir, salina, salt pond, stagnant water, standing water, still water, sump, tank, tarn, tidal pond, volcanic lake, water hole, water pocket, well |