What is the meaning of ?

a sea, an ocean

a lake

an object covering over a large area, as in 血の海 (chi no umi, pool of blood) or 火の海 (hi no umi, sea of fire)

a mare (dark surface of a celestial body, thought to appear like a sea)

in a (suzuri, inkstone), a reservoir where water is stored

a female given name

of the sea, of the ocean

sea, ocean

sea, ocean

Source: wiktionary.org