flag‧ship /ˈflæɡʃɪp/ noun [countable]

1. the most important ship in a group of ships belonging to the navy

2. [usually singular] the best and most important product, building etc that a company owns or produces:
the flagship of the new Ford range
The firm has just opened a flagship store in Las Vegas.
the company’s flagship product

[TahlilGaran] Dictionary of Contemporary English ▲