theirs - definition and synonyms

 
pronoun 

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/ðeə(r)z/
Theirs is used as a possessive pronoun, being a possessive form of they.
It can refer to a singular or plural noun, and it can be the subject, object, or complement of a verb or the object of a preposition: Our cat is dark grey, but theirs is black.Our children are definitely better behaved than theirs.
  1. 1
    used for referring to someone or something that belongs to or is connected with a particular group of people or animals that have already been mentioned

    Sharon’s parents claim that the house is legally theirs.

    Your garden is big, but I think theirs is bigger.

    of theirs:

    They introduced us to some friends of theirs.

     Synonyms and related words
  2. 2
    mainly spoken used instead of ‘his or hers’, especially when you are referring back to a word such as ‘everyone’, ‘someone’, or ‘anyone’

    I haven’t got my exam results yet, but everyone else has had theirs.

     Synonyms and related words
    See also they