No, “our” is not a third-person word. It is a possessive pronoun that is used to indicate that something belongs to a group of people or entities, including the person speaking.

In English grammar, there are three types of pronouns: personal pronouns, possessive pronouns, and reflexive pronouns. Personal pronouns are used to refer to people or things, and they are divided into three categories: first person, second person, and third person. First person pronouns refer to the speaker or writer (“I” and “we”), second person pronouns refer to the listener or reader (“you”), and third person pronouns refer to someone or something outside of the speaker and listener or reader.
Third person pronouns include “he,” “she,” “it,” “they,” and “them,” among others. These pronouns are used to refer to people, animals, or objects that are not the speaker or listener/reader. For example, “He is going to the store” or “They are watching a movie.”
Possessive pronouns, like “our,” are used to indicate ownership or possession of something. Other examples of possessive pronouns include “my,” “your,” “his,” “her,” “its,” “their,” and “mine,” “yours,” “hers,” “theirs,” and “ours.” For example, “This is our house” or “The book is hers.”
It is important to note that possessive pronouns can also be used in combination with nouns, as in “our house” or “her book.” In this case, the pronoun acts as an adjective to describe the noun and indicate possession.
In conclusion, “our” is not a third-person word, but rather a possessive pronoun used to indicate ownership or possession by a group of people or entities, including the speaker.