Flag and pennant patterns, in technical analysis Mathematics Flag (geometry), part of a polygon, polyhedron or higher polytope Flag (linear algebra), an increasing sequence of subspaces of a vector space Physical science and technology Flagstone or flag, a large flat stone used for paving, fencing, or roofing Politics and government The Free Legal Assistance Group or FLAG, the largest firm of Filipino human rights lawyers Flag state, the state under whose laws a merchant ship is registered or licensed Sports and games Flag, a baton used in the sporting event Beach Flags Flag, a type of bet offered by UK bookmakers Flag, a casino token used at the Bellagio in Las Vegas, Nevada Penalty flag or flag, a yellow cloth used by game officials in some field sports to indicate an infraction The prize for being the premier of the Australian Football League. Other uses Church of Scientology Flag Service Organization, commonly referred to in Scientology as "Flag," in Clearwater, Florida, U.S. See also Flagg (disambiguation) Flagger (disambiguation) Flagging (disambiguation) Red flag (disambiguation)