sea

Từ điển Oxford Learners Wordfinder Dictionary

1 seas and oceans
2 movements of the sea
3 where the sea meets the land
4 travelling on the sea
5 working at sea
animals that live in the sea FISH ¹
see also LAND, WORLD

1 seas and oceans
- the salty water that covers much of the surface of the earth: sea (noun U)
to swim in the sea ◎ to live by the sea ◎ the deep blue sea ◎ a journey by sea
- a particular area of sea: sea
the Mediterranean sea
- one of the main areas of sea: ocean
the Atlantic Ocean ◎ an ocean voyage
- an area of sea that is largely enclosed by a curved coastline: bay
the Bay of Bengal
- an area of sea that is almost surrounded by land: gulf
the Gulf of Mexico ◎ the Persian Gulf
- a narrow area of sea between two pieces of land: channel
the English Channel
- the top of the sea: surface
The fish were swimming close to the surface.
- the bottom of the sea: seabed, bottom, floor
Can you see the bottom? ◎ the floor of the ocean
- the distant line where the sea seems to meet the sky; the furthest point we can see in the distance: horizon
Can you see the ship? It's like a small dot on the horizon.
- the water in the sea: sea water (noun U)
- different types of plant which grow in the sea: seaweed (noun U)
- a light wind by the sea: sea breeze

2 movements of the sea
- a raised line of water that moves across the surface of the sea: wave
- when a wave falls on the shore, it breaks*
the sound of the waves breaking on the shore
- when there are a lot of waves, the sea is rough; opposite: calm
The water's much rougher today.
- the flow of water in the sea that can make it dangerous to swim: current
You can't swim here because of the dangerous currents.
- the regular rising and falling of the level of the sea: tide; adjective: tidal
- when the water level is high and the water is closer to the shore, the tide is in, it is high tide
- when the water level is low and the water is further from the shore, the tide is out, it is low tide
- when the tide gets higher, it comes* in; when it gets lower, it goes* out

3 where the sea meets the land
- the land beside or near the sea: coast; adjective: coastal; the shape of the coast: coastline
We could already see the French coast. ◎ coastal regions ◎ a spectacular coastline
- the land at the edge of the sea: shore (noun C/U), seashore (noun U)
a few hundred yards from the shore ◎ to go on shore (= to get off a boat and go on to the land)
We went for a walk along the seashore.
- a steep, rocky part of the coast: cliff
The hotel is at the top of a cliff.
- an area on the coast where people go on holiday: seaside (noun singular)
a day at the seaside ◎ a seaside hotel
- an area of land by the sea, usually covered with sand or stones, and often covered by the sea at high tide: beach
sunbathing on the beach ◎ a sandy/stony beach
※ more on beaches BEACH
- a piece of land with water all around it: island
a desert island (= a tropical island where no one lives)
- a piece of land that is almost surrounded by water: peninsula
the Iberian Peninsula
- a piece of land that sticks out into the sea: cape
Cape Horn ◎ The Cape of Good Hope

4 travelling on the sea
- to go on the sea in a boat: sail
We sailed across the Atlantic.
- a person who is on the sea in a boat is at sea
They'd been at sea for three months.
- a journey across an area of sea: crossing
Did you have a pleasant crossing? ◎ a transatlantic crossing (= a journey across the Atlantic Ocean)
- a long journey by sea: (formal) voyage
- to arrive on land: land, go* ashore
We landed at Southampton. ◎ It was such a relief when we finally went ashore.
- when you feel sick on a boat because of the movement of the waves, you are seasick
- an accident at sea in which a ship is destroyed: shipwreck
- a person or ship that has suffered such a accident has been shipwrecked
※ more on boats and travelling by sea BOAT
- a place on the coast where ships can be tied up to shelter from the sea: harbour (AmE harbor)
- an area where ships load and unload goods and passengers: port

5 working at sea
- a person who works in boats at sea: sailor, seaman (plural seamen)
- a person who sails on the sea in order to catch fish: fisherman (plural fishermen)
- a person who swims underwater wearing special breathing equipment: diver; a diver who works in deep water: deep-sea diver
- to become a sailor: go* to sea
He went to sea at the age of 16.
- a special boat that goes out to rescue people who are in danger at sea: lifeboat
- a person who works on the coast, watching the sea in order to help people and boats which are in trouble: coastguard
- a tower by the sea with a light at the top that guides people in boats and shows them where the land is: lighthouse
※—† MORE ...
- a hard pink or red substance that is found under the sea: coral (noun U)
a coral island
- a line of rocks, coral, etc, on or under the surface of the sea: (coral) reef
- connected with the sea: marine, maritime
marine animals ◎ maritime law