In flag terminology, what does 'ensign' mean?

In flag terminology, the term 'ensign' specifically refers to a national flag that represents a country or a nation. The ensign is typically used in maritime contexts and signifies the presence of a nation’s vessels on the water. It serves to identify the nationality of the ship and is flown to demonstrate the country's sovereignty, especially in naval operations.

The other terms relate to different types of flags. A ceremonial flag is often used in formal occasions but does not carry the same legal and national identity as an ensign. A division flag is specific to military or organizational units rather than representing an entire nation. A ceremonial banner is often used for decoration or ceremonial purposes and does not have the same authoritative meaning as a national flag. Thus, 'ensign' is best defined as a national flag due to its role and significance in representing a country's identity.