Main Entry:

theirs

Pronunciation:

\ˈtherz\

Function:

pronoun, singular or plural in construction

Date:

14th century

1 : that which belongs to them —used without a following noun as a pronoun equivalent in meaning to the adjective their 2 : his or hers : his, hers —used with an indefinite third person singular antecedent <I will do my part if everybody else will do theirs>