seanoun
uk/siː/us/siː/A1 [ C or U ] 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 sea of sth
a large amount or number of something:
The teacher looked down and saw a sea of smiling faces.
put (out) to sea
(of a ship) to leave a port and start a journey:
The boats will put (out) to sea on this evening's high tide.
[ C ] one of the large, flat areas on the moon that in the past were thought to be seas
More examples
- I can see the sea from my window.
- He was swept out to sea by the strong current.
- I could hear the sound of the sea.
- She emerged from the sea, blue with cold.
- They stripped naked and ran into the sea.
Thesaurus: synonyms and related words
Seas & oceans
- Aegean
- briny
- deep-sea
- depth
- English Channel
- guyot
- la Niña
- marine
- med
- mid-ocean ridge
- ocean
- oceanic
- oceanography
- salt water
- territorial sea
- the doldrums
- the high seas
- the Irish Sea
- the Southern Ocean
- undersea
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You can also find related words, phrases, and synonyms in the topics:
Masses and large amounts of things
Arriving & departing by boat or ship
Astronomy
Idiom(s)
at sea
run away to sea