- the underground electric railway of Paris, France, Montreal, Canada, Washington, D.C., and other cities.
- subway (def. 1).
- metropolis (defs. 1, 2).
- the government or jurisdiction of a large city.
- a combining form meaning “measure,” used in the formation of compound words: metronome.
- a combining form meaning “uterus,” used in the formation of compound words: metrorrhagia.
- a combining form representing metropolis or metropolitan in compound words: metroflight; metroland; Metroliner.
- an underground, or largely underground, railway system in certain cities, esp in Europe, such as that in Paris
- indicating the uterus
- indicating a measure
