n. One of the larger bodies of salt water, less than an ocean, found on the earth's surface; a body of salt water of second rank, generally forming part of, or connecting with, an ocean or a larger sea.n. An inland body of water, esp. if large or if salt or brackish; ; sometimes, a small fresh-water lake.n. The ocean; the whole body of the salt water which covers a large part of the globe.n. The swell of the ocean or other body of water in a high wind; motion or agitation of the water's surface; also, a single wave; a billow.n. A great brazen laver in the temple at Jerusalem; -- so called from its size.n. Fig.: Anything resembling the sea in vastness.