Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • pronoun Used to indicate the one or ones belonging to them.
  • pronoun Usage Problem His or hers.

from The Century Dictionary.

  • See they.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • pronoun That which belongs to them; the possessive case of they, used without a following noun.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Middle English, from their, their; see their.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

their +‎ -'s

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Examples

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