their - definition and synonyms


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Their is used as a possessive determiner (followed by a noun), being a possessive form of they.
  1. 1
    belonging to or relating to a particular group of people or things that have already been mentioned or when it is obvious which ones you are referring to

    Workers are afraid that they will lose their jobs.

    She has made a study of chemical fertilizers and their effect on the environment.

    of their own:

    They have children of their own.

     Synonyms and related words
  2. 2
    mainly spoken used instead of ‘his or her’, especially when you are referring back to a word such as ‘everyone’, ‘someone’, or ‘anyone’. Many people consider this use incorrect

    Everyone has their own way of doing things.

     Synonyms and related words
    See also they