pronoun A person who identifies as male, or animal already known or implied.
That friend of your cousin's, he's on the phone.
pronoun They; he or she (a person whose gender is unknown or irrelevant).
The rulebook clearly states that "if any student is caught cheating, he will be expelled", and you were caught cheating, were you not, Anna?
pronoun It; an animal whose gender is unknown.
pronoun A genderless object regarded as masculine, such as certain stars or planets (e.g. Sun, Mercury, Mars, Jupiter) or certain ships.
pronoun ↑ “he”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.
pronoun ↑ When Words Collide: A Media Writer's Guide to Grammar and Style (2007, →ISBN)
pronoun ↑ The Pocket Wadsworth Handbook, 2009 MLA Update Edition →ISBN, page 81: [A]void using the generic he or him when your subject could be either male or female. [...] Sexist: Before boarding, each passenger should make certain that he has his ticket. / Revised: Before boarding, passengers should make certain that they have their tickets.