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English definition of “age”

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age

noun uk   /eɪdʒ/ us  

age noun (TIME SPENT ALIVE)

A1 [C or U] the period of time someone has been alive or something has existed: Do you know the age of that building? What age (= how old) is your brother? I'd guess she's about my age (= she is about as old as I am). She was 74 years of age when she wrote her first novel. He left home at the age of 16. I was married with four children at your age. She's starting to show/look her age (= to look as old as she is). I'm really beginning to feel my age (= feel old). His girlfriend's twice his age (= twice as old as he is).act your age! said to someone to tell them to stop behaving like someone who is much youngerthe age of consent the age at which someone is considered by the law to be old enough to agree to have sex with someone
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age noun (PERIOD)

B1 [C] a particular period in time: the Victorian age the modern age the nuclear age
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age noun (LONG TIME)

ages B1 [plural] informal ( also mainly UK an age [S])
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a very long time: It takes ages to cook. I've been waiting for ages. It's been ages/an age since we last spoke.

age noun (BEING OLD)

C2 [U] the fact of being or getting older: Her back was bent with age. This cheese/wine improves with age. Her temper hasn't improved with age!
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age

verb [I or T] uk   /eɪdʒ/ ( present participle UK ageing or US aging, past tense and past participle aged) us  
If someone ages or something ages them, they look older: She's aged since the last time we met. to develop in flavour or leave something to do this: The brandy is aged in oak for ten years.
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(Definition of age noun, verb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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