flagshipflag·ship /ˈflægʃɪp/ adjectiveadj [only before a noun]1COMMERCEECONOMICSa flagship product is the best and most important one that a company producesThe St. Louis based brewer, Anheuser-Busch, has just launched a new advertising campaign for its flagship brand, Budweiser.
2ORGANIZATIONSa flagship company is one of the best in its industry or countryThe UK’s flagship airline BA is facing increased competition from smaller carriers.
3PROPERTYa flagship building is the best and most important one that a company ownsOver a quarter of annual sales still come from the company’s flagship store on Fifth Avenue in Manhattan.
—flagship noun [countableC]The company he founded grew into a chain of 19 bookstores, including a five-story flagship in downtown Chicago.