Meaning of “birth” in the English Dictionary

british dictionary

"birth" in British English

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birthnoun

uk /bɜːθ/ us /bɝːθ/

A2 [ C or U ] the time when a baby or young animal comes out of its mother's body:

It was a difficult birth.
He weighed eight pounds at birth.
More men are present at the births of their children these days.
The application form will ask for your country/place of birth (= where you were born).

[ C ] a child that is born:

The percentage of live births (= children who are born alive and continue to live) continues to increase.
Registration of births and deaths became compulsory in 1871.

[ U ] the position of the family into which you are born, especially its social position:

He had received all the advantages of birth (= having been born into a family of a high social class) and an expensive education.
American, Italian, etc. by birth

B2 born in a particular place or having parents of a particular nationality:

Oscar Wilde was Irish by birth.

C1 the beginning of something:

These asteroids were formed at the birth of the solar system.

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

"birth" in American English

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birthnoun [ C/U ]

us /bɜrθ/

the occasion when a baby comes out of its mother’s body:

[ C ] He remembered the birth of their first child.
[ U ] Their son weighed eight pounds at birth.

Birth also refers to your family origin:

[ U ] She was Swedish by birth.

When a woman gives birth, one or more babies come out of her body:

[ U ] She gave birth to twins.

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