pronoun
theirs
Something belonging to the people or person referred to as they.
Our house is small, but theirs has plenty of room.
Etymology
The possessive their takes the ending used for an independent form. Theirs stands on its own without a following possessed noun.
More examples
- These gloves are mine, and those are theirs.
- Jordan and Alex say the blue backpack is theirs.
- We offer advice, but the final decision is theirs.