(n): a commissioned officer in the navy
(n): an emblem flown as a symbol of nationality
(n): a visible symbol representing an abstract idea
(n): emblem usually consisting of a rectangular piece of cloth of distinctive design
(n): colors flown by a ship to show its nationality
(n): a flag that shows its nationality
"the lowest grade among the commissioned officers of a company of infantry; the youngest ensign in the regiment supports the colours. Ensign is also a banner or flag." (citation in Historical Military Terms list description)