theirs
pronUK /ðɛəz/ · US /ðɛɚz/
Etymology From Middle English theires, attested since the 1300s. Equivalent to their + -s (compare -'s); formed by analogy to his. Displaced theirn (from Middle English theiren, formed by analogy to mine, thine) in standard speech.
1
That or those belonging to them; the possessive case of they, used without a following noun.
- This luggage is theirs. These passports are also theirs.
- Theirs cost a lot more than ours.
2 more examples
- That cat of theirs got into our garden again.
- The letter had been given to the two Englishmen by a good friend of theirs in London, who had been in America two years previously, and had singled out Mr. J. L. Westgate from the many friends he had left there as the consignee, as it were, of his compatriots.1878, Henry James, An International Episode:
2
Informal Their house or home.
- Let's go over to theirs.