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their

determiner
 
 
/ðeər/ US  /ðer/

Definition

A1 of or belonging to them: He gave them their coats.Possessive forms B1 used to refer to one person in order to avoid saying 'his or her': One of the students has left their book behind.Possessive forms
(Definition of their determiner from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“their” in other dictionaries

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