Definitions for "House flag"
Keywords:  flown, flag, ship, yacht, denotes
a corporate or personal flag; a flag which does not signify nationality or citizenship. Often flown by a merchant ship to identify the company that owns it.
The flag of a commercial firm or an individual.
The distinguishing flag of a commercial firm, flown especially at sea; sometimes used in reference to the personal flag of the owner of a yacht or home.