Origin: Germanic Old English suffix
Flagship has 4 different meanings across 1 category:
the ship that carries the commander of a fleet and flies his flag
"The admiral boarded our flagship to oversee the entire naval operation from the deck where his personal flag flew high above."
The ship occupied by the fleet's commander (usually an admiral); it denotes this by flying his flag.
"The admiral boarded the flagship to lead the entire fleet into battle."
To act as a flagship for
"The new community center was designed to serve as a flagship for youth development programs across the entire region."