Definition of ocean

• n. - The whole body of salt water which covers more than three fifths of the surface of the globe; -- called also the sea, or great sea.
• n. - One of the large bodies of water into which the great ocean is regarded as divided, as the Atlantic, Pacific, Indian, Arctic and Antarctic oceans.
• n. - An immense expanse; any vast space or quantity without apparent limits; as, the boundless ocean of eternity; an ocean of affairs.
• a. - Of or pertaining to the main or great sea; as, the ocean waves; an ocean stream.