- theirs
- theirs [ ðerz ] pronoun *Theirs is used as a possessive pronoun, being a possessive form of they.It can refer to a singular or plural noun, and it can be the subject, object, or complement of a verb or the object of a preposition:Our cat is dark gray, but theirs is black.Our children are definitely better behaved than theirs.1. ) used for referring to someone or something that belongs to or is connected with a particular group of people or animals that have already been mentioned:Sharon's parents claim that the house is legally theirs.Your yard is big, but I think theirs is bigger.of theirs: They introduced us to some friends of theirs.2. ) MAINLY SPOKEN used instead of his or hers, especially when you are referring back to a word such as everyone, someone, or anyone :I haven't gotten my exam results yet, but everyone else has gotten theirs.=> THEY
Usage of the words and phrases in modern English. 2013.