Metro is:

• a general term, synonymous with subway or underground, for an urban underground rail public transit system (see metro and list of metro systems);
• any of several specific public transport systems, including the Los Angeles County Metropolitan Transportation Authority, the Washington Metro in Washington, D.C., and the Metropolitan Transit Authority of Harris County, Texas of Houston;
• the common name of the West Yorkshire Passenger Transport Executive in the UK;
• short for metropolitan area (as in Metro Manila or Washington, DC Metro Area);
• short for Metropolitan Service District, a regional government surrounding the Portland, Oregon metropolitan area;
• short for MetroStars, American soccer team;
• Metro AG, Germany's largest retailer;
• Metro Picture Corporation , a film studio formed in 1915 and later merged into Metro-Goldwyn-Mayer;
• a make of car produced by Rover in Europe;
• a make of car sold by General Motors in the United States;
• one of two free newspapers: Metro International and Metro (Associated Metro Limited);
• The word for metre, the unit of length, in several languages including Spanish, Italian and Portuguese;
• a slang term for metrosexual;
• a commercial supermarket chain in Egypt;
• A 1997 movie.