1. An admiral, of whom there are three ranks; respectively indicated by the mast on which the flag is flown.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dlag officer,
• clag officer,
• vlag officer,
• glag officer,
• tlag officer,
• rlag officer,
• fkag officer,
• fpag officer,
• foag officer,
• flzg officer,
• flsg officer,
• flwg officer,
• flqg officer,
• flaf officer,
• flav officer,
• flab officer,
• flah officer,
• flay officer,
• flat officer,
• flag ifficer

The adjective form of the word "flag officer" is "flag-officer".

The plural form of the word "flag officer" is "flag officers".

The singular form of the word "flag officer" is "flag officer". The term refers to a senior military officer in the navy or coast guard who holds a flag rank, typically Admiral or Vice Admiral.