sea

6 definitions • 11 examples

the salty water that covers a large part of the surface of the earth, or a large area of salty water, smaller than an ocean, that is partly or completely surrounded by land:

the Mediterranean Sea

We went swimming in the sea.

The sea was calm/smooth/choppy/rough when we crossed the Channel.

The refugees were at sea (= in a boat on the sea a long way from land) for 40 days before reaching land.

When we moved to the US, we sent our things by sea (= in a ship).

We spent a week by the sea (= on the coast) this year.

Soon we had left the marina and were heading towards the open sea (= the part of the sea a long way from land).

a large amount or number of something:

The teacher looked down and saw a sea of smiling faces.

(of a ship) to leave a port and start a journey:

The boats will put (out) to sea on this evening's high tide.

one of the large, flat areas on the moon that in the past were thought to be seas

a large area of salt water that is partly or completely surrounded by land, or the salt water that covers most of the surface of the earth:

[ C ] the Caribbean/Mediterranean Sea

[ C ] The seas are filled with creatures we know nothing about.

If you travel by sea, you go in a ship.