Plural pronouns are words that refer to more than one person or thing. The most commonly used plural pronouns are 'THEM, ' 'our, ' and 'they.' 'THEM' is a pronoun used to refer to a group of people or things previously mentioned. 'Our' is a pronoun used to refer to a group that includes the speaker or writer. 'They' is a pronoun used to refer to a group of people or things without specifying who they are.