noun
A large body of salt water.
A lake, especially if large or if salty or brackish.
A single wave; billow.
The swell of the sea, especially when high or rough.
(attributive, in combination) Living or used in or on the sea; of, near, or like the sea.
(figurative) Anything resembling the vastness or turbulence of the sea in mass, size or quantity.
(physics) A constant flux of gluons splitting into quarks, which annihilate to produce further gluons.
(planetology) A large, dark plain of rock; a mare.
(planetology) A very large lake of liquid hydrocarbon.