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.

the waves.

a large wave

The heavy seas almost drowned us.

a widely extended, copious, or overwhelming quantity

a sea of faces; a sea of troubles.

the work, travel, and shipboard life of a sailor

The sea is a hard life but a rewarding one.

Astronomy . mare 3 .

of, pertaining to, or adapted for use at sea. ?

at sea

on the ocean.

perplexed; uncertain

completely at sea as to how to answer the question. Also, asea.

follow the sea

to pursue a nautical career

Many boys then dreamed of following the sea.

go to sea

to set out on a voyage.

to embark on a nautical career.

half seas over

Slang . partly or completely drunk

They came home at dawn, looking half seas over. Also, half-seas over.

put to sea

to embark on a sea voyage

The expedition is nearly ready to put to sea. Also, put out to sea.