What does "flag officer" mean?

A naval officer with the rank of rear admiral or above. Such officers are entitled to fly a personal flag, especially on the flagship.

What is a synonym for "flag officer"?

Common synonyms include: admiral, commodore, commodores.

noun, slang

noun, slang ·Uncommon ·College level

Noun

1
A naval officer with the rank of rear admiral or above. Such officers are entitled to fly a personal flag, especially on the flagship.
2
a senior naval officer above the rank of captain wordnet
3
In addition to naval officers of Navy and the Coast Guard, a general officer in the Army, Marines, or Air Force with the rank of brigadier general or higher. US, informal