sea

sea/ si /

noun
the salt waters that cover the greater part of the earth’s surface.
a division of these waters, of considerable extent, more or less definitely marked off by land boundaries:
the North Sea.
one of the seven seas; ocean.
a large lake or landlocked body of water.
the degree or amount of turbulence of the ocean or other body of water, as caused by the wind.

adjective
of, relating to, or adapted for use at sea.

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