Meaning of “sea” - Learner’s Dictionary


noun us uk /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).

More examples


A1 a particular area of salt water:

the North Sea
the Black Sea
a sea of sth

a large number of something:

He looked across the room and saw a sea of faces.

(Definition of “sea” from the Cambridge Learner’s Dictionary © Cambridge University Press)