Noun

1. In grammar, the form of a verb used when the subject of a sentence is not the audience or the one making the statement. In English, pronouns used with the third person include he, she, it, one, they, and who.

   "Is" is the third person singular of "to be"

2. A form of narrative writing using verbs in the third person in order to give the impression that the action is happening to another person.
3. The pronouns he, she, it, they and one.