theirs
/ðɛɚz/pronoun
theirs is spelled T-H-E-I-R-S. The wrong spelling people search most is their's: about 100 Bing searches a month in the United States (September 2025 to August 2026), about 2 in 10 of all searches for the word. Theirs is a pronoun meaning “That or those belonging to them; the possessive case of they, used without a following noun”.
How do you spell theirs?
Theirs is spelled T-H-E-I-R-S. One wrong spelling is searched or written often enough to measure; together they are about 2 in 10 of the searches for theirs in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
What does theirs mean?
pronoun
- 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.
- 2
informalTheir house or home.
Let's go over to theirs.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce theirs?
- UK /ðɛəz/
- UK /ðɛːz/
- US /ðɛɚz/
Theirs has one syllable (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-theirs.ogg, Wikimedia Commons (author and licence on each file's page).
How common is theirs?
Theirs appears 9.1 times per million words in written English, the 7,553rd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Theirs in Spanish, French, German and Portuguese
In the sense that which belongs to them:
| Language | Words |
|---|---|
| French | le leur, la leur, les leurs |
| German | ihrer, ihre, ihres |
| Portuguese | seu, deles |
| Spanish | suyo, suya, suyos, suyas |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does theirs come from?
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.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).