What is Ensign?
Ensign definition and meaning on Dictionary terms:
a flag or banner, as a military or naval standard used to indicate nationality.
a badge of office or authority, as heraldic arms.
a sign, token, or emblem: the dove, an ensign of peace.
U.S. Navy and Coast Guard. the lowest commissioned officer, ranking next below a lieutenant, junior grade, and equal to a second lieutenant in the Army.
Archaic. standard-bearer(def 1).