commodore

1. A naval officer holding a rank between captain and rear admiral.
2. A (temporary) commander over a collection of ships who is not an admiral.
3. The leading ship in a fleet of merchantmen.
4. The president of a yacht club.
5. A yacht-club president's vessel in a regatta.
6. A rear admiral (lower half). (US)
7. Any of various nymphalid butterflies of the Asian genus Parasarpa.

الجمع commodores