flag%20carrier

noun

1. 1

   A person carrying a standard or flag, usually at sporting events and parades, previously on the battlefield.

2. 2

   A transportation company, such as a shipping or airline company, that is registered in a given state

3. 3

   A strong supporter of a cause, or perhaps the strongest and most visible supporter of said cause.

   “"Bill was the flag carrier of the movement to improve inner city education."”

4. 4

   A national airline (typically having the flag, or other national insignia, on the tail)

5. 5

   An aircraft carrier serving as a flagship