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English definition of “their”

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their

determiner
 
 
/ðeər/
OF A GROUP A1 belonging to or relating to a group of people, animals, or things that have already been talked about: It was their problem, not mine.Possessive forms
HIS/HER B1 used to refer to what belongs to or relates to a person when you want to avoid saying 'his' or 'her' or when you do not know if the person is male or female: Did this person give their name?Possessive forms
(Definition of their from the Cambridge Learners Dictionary © Cambridge University Press)
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