ensign

(ĕnˈsən, -sīnˌ)

1. A national flag displayed on ships and aircraft, often with the special insignia of a branch or unit of the armed forces.
2. A standard or banner, as of a military unit.
3. Archaic A standard-bearer.
4. (ĕnˈsən) Abbr. ENS
   a. A commissioned rank in the U.S. Navy or Coast Guard that is below lieutenant junior grade.
   b. One who holds this rank.
5. a. A badge of office or power; an emblem: “I want the seals of power and place,/The ensigns of command,/Charged by the people's unbought grace,/To rule my native land” (John Quincy Adams).
   b. A sign; a token.