Merriam-Webster Collegiate Dictionary - third person

 noun  Date: circa 1586  1.  a. a set of linguistic forms (as verb forms, pronouns, and inflectional affixes) referring to one that is neither the speaker or writer of the utterance in which they occur nor the one to whom that utterance is addressed “they” is a pronoun of the ~  b. a linguistic form belonging to such a set  c. reference of a linguistic form to one that is neither the speaker or writer of the utterance in which it occurs nor the one to whom that utterance is addressed referred to himself in the ~  2. a style of discourse marked by general use of verbs and pronouns of the ~ the story was written in the ~