sea

 
Pronunciation: /siː/

noun

(often the sea)
  • the expanse of salt water that covers most of the earth’s surface and surrounds its land masses: a ban on dumping radioactive wastes in the sea [as count noun]: the seas today swarm with crustacean arthropods
  • [often in place names] a roughly definable area of the sea: the Black Sea
  • (seas) large waves: the lifeboat met seas of thirty-five feet head-on
  • [count noun] a vast expanse or quantity of something: she scanned the sea of faces for Stephen

Phrases

at sea

sailing on the sea: he spends long hours at sea on a small catamaran
(also all at sea) confused or unable to decide what to do: he feels at sea with economics

by sea

by means of a ship or ships: other army units were sent by sea

go to sea

set out on a voyage: the fishermen were unable to go to sea in such storms
become a sailor in a navy or a merchant navy: Garret left the small family farm in his late teens and went to sea

on the sea

situated on the coast.

put (out) to sea

leave land on a voyage: the Alabama put to sea the next morning

Origin:

Old English , of Germanic origin; related to Dutch zee and German See