flagship

Etymology

flag + ship

noun

1. (nautical, military) The ship occupied by the fleet's commander (usually an admiral); it denotes this by flying his flag.
   After Russia’s flagship in the Black Sea, the Moskva, sank last week, the authorities said that the entire crew of more than 500 had been rescued. 2022-04-21, Neil MacFarquhar, Alina Lobzina, “With sunken warship, Russian disinformation faces a test.”, in The New York Times, →ISSN
2. (nautical) The ship regarded as most important out of a group, e.g. a nation's navy or company's fleet.
3. (by extension, often attributive) The most important one out of a related group.
   The retail company's store in London is their flagship.
   Ars Technica’s Ron Amadeo considered the two smartphones together, and claimed them worthy flagships for Android: […] 2015-10-20, Stuart Dredge, “Google Nexus 5X and Nexus 6P review roundup: impressive Android flagships”, in The Guardian
   Next year, Stella McCartney’s London flagship store will move from Bruton Street to a landmark Old Bond Street location. The move is the most prominent symbol of the label’s strong financial results. October 2, 2017, Jess Cartner-Morle, “Stella McCartney lays waste to disposable fashion in Paris”, in The Guardian
   Transport Minister Baroness Vere has conceded that the Government does not yet know how its flagship £96 billion Integrated Rail Plan "will actually work on the ground". January 12 2022, Paul Stephen, “Network News: Vere admits to Lords: IRP lacks information”, in RAIL, number 948, page 10

verb

1. To act as a flagship for.