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Meaning of their

their

Pronunciation: (âr unstressed &schwar), [key]
— pron.
  1. a form of the possessive case ofused as an attributive adjective, before a noun: their home; their rights as citizens; their departure for Rome.
  2. (used after an indefinite singular antecedent in place of the definite masculine form his or the definite feminine form her):Cf. Someone left their book on the table. Did everyone bring their lunch?
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.