An indefinite pronoun is a type of pronoun that refers to non-specific persons or things. Unlike definite pronouns, which point to specific entities, indefinite pronouns can represent a variety of subjects. Common examples include words like someone, anyone, everyone, something, and nothing. These pronouns help convey generality and inclusiveness in language. Indefinite pronouns can be singular, plural, or both, depending on their usage. For instance, all, some, and few are plural indefinite pronouns, while each, either, and neither are singular. Understanding how to use indefinite pronouns effectively can enhance clarity and flexibility in communication.