indefinite pronoun 
noun Grammar
A pronoun that does not refer to any person, amount, or thing in particular, e.g. anything, something, anyone, everyone.And there is an irritating mannerism, in which he uses the feminine personal pronoun in place of the indefinite pronoun, that gradually wore on my nerves....
- An indefinite pronoun is a word that replaces a noun but does not refer to a specific person, place, or thing.
- Some indefinite pronouns always take a plural verb, which means that the verb is conjugated for a plural subject.