(1):

(obj.) The man or male being (or object personified to which the masculine gender is assigned), previously designated; a pronoun of the masculine gender, usually referring to a specified subject already indicated.

(2):

(obj.) Man; a male; any male person; - in this sense used substantively.

(3):

(obj.) Any one; the man or person; - used indefinitely, and usually followed by a relative pronoun.