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English definition of “sea”

sea

noun     /siː/
A1 [C, U] a large area of salt water : I'd like to live by the sea. We went swimming in the sea. It was our third day at sea (= travelling on the sea). It's cheaper to send parcels by sea (= on a ship ).Seas and oceans
Sea A1 a particular area of salt water : the North Sea the Black SeaSeas and oceans
a sea of sth a large number of something: He looked across the room and saw a sea of faces .Large in number or quantity
(Definition of sea noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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