- (grammar) A variety of the third person sometimes used for indefinite referents, such as one in one shouldn't do that.
- (linguistics) grammatical person in some languages distinct from first, second, and third persons, semantically translated by one of them in English. For example, in Ojibwe, it is a variety of the third person used for a secondary, or obviative, third person.
- The man saw the dog as he was leaving. (if he is the third person, or proximate, it refers to the man; if he is the fourth person, or obviative, it refers to the dog)