old man Definition

1. slang
Someone's husband or father.
Thesaurus: father, parent, patriarch, head of the house, paterfamilias; husband.
2. colloq
An affectionate form of address for a man or boy, usually only said by a man addressing another man.
3. colloq
Someone in command, eg the captain of a merchant ship; a boss.
4. theol.
Unregenerate human nature.
5. southernwood.
(Austral)
6. A full-grown male kangaroo.