house flag

/HH AW1 S F L AE0 G/
noun
  1. 1

    A flag flown at a house.

noun
  1. 1

    A flag that uniquely identifies the company that owns or, occasionally, that operates a ship.

  2. 2

    (by extension) A flag that identifies a company, unit, or other group.

Source: https://en.wiktionary.org/wiki/house%20flag, https://en.wiktionary.org/wiki/house-flag