old man

noun Informal.

1. a father, usually one’s own: His old man’s letting him have the car for the prom.
2. a husband: The office is giving my old man a retirement party.
3. a boyfriend or male lover, especially a male lover with whom one cohabits.
4. (sometimes initial capital letters) a person in a position of authority, especially an employer or a commanding officer: The Old Man has ordered an inspection for Saturday morning.
5. (used affectionately in addressing a man).
6. old Adam.
7. southernwood.

noun

1. an informal term for father, husband (def. 1)
2. (sometimes capitals) informal a man in command, such as an employer, foreman, or captain of a ship
3. sometimes facetious an affectionate term used in addressing a man
4. another name for southernwood
5. Australian informal
   1. an adult male kangaroo
   2. (as modifier)very large
6. Christianity the unregenerate aspect of human nature