Definition of “west” - English Dictionary

“west” in British English

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westnoun [ U ]

also West uk /west/ us /west/ written abbreviation W

A2 the direction in which the sun goes down in the evening, opposite to the east, or the part of an area or country that is in this direction:

The points of the compass are north, south, east, and west.
The sun rises in the east and sets in the west.
Most of the region will be dry tomorrow, but the west will have some rain.
The Black Country is/lies to the west of Birmingham.
(the) West

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B2 North America and western Europe:

There has been concern in/throughout the West about the effects of this measure.
East-West relations

In the US, the West is the part of the country west of the Mississippi river that only became developed in the late 1800s:

the Wild West
out west US

to or in the west of the US:

Travis moved out west after college.

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Idiom(s)

westadjective

also West uk /west/ us /west/ written abbreviation W

westadverb

also West uk /west/ us /west/ written abbreviation W

(Definition of “west” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“west” in American English

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westnoun [ U ]

us /west/ abbreviation W.

the direction where the sun goes down in the evening that is opposite east, or the part of an area or country which is in this direction:

The points of the compass are north, south, east, and west.
The sun sets in the west.

Idiom(s)

westadjective, adverb [ not gradable ]

us /west/ abbreviation W.

lying toward, coming from, or being at the west part:

the west coast
The town is west of here.

the West

the part of the US west of the Mississippi River:

The museum grounds contain an Indian tepee and a large, heavy wagon used by early 19th-century settlers of the West.
the West

North America and the countries in the western part of Europe are also referred to as the West:

The West must make a commitment to Africa to help find solutions to the continent's problems.

(Definition of “west” from the Cambridge Academic Content Dictionary © Cambridge University Press)