pronoun sing. I

1. the persons speaking or writing: used to refer to the speaker or writer and another or others, sometimes including those addressed: personal pronoun in the first person plural: we is the nominative form, us the objective, ours the possessive, and ourselves (or, by a king, etc., ourself ) the reflexive and intensive; our is the possessive pronominal adjective
2. I: used by a monarch, editor, judge, etc. to indicate that the authority of his or her position or profession is represented
3. you: used in direct address as in encouraging or admonishing an invalid, a child, etc. [shall we take our medicine now?]

Etymology: ME < OE, akin to Ger wir, Goth weis < IE base *we-, we > Sans vayám