) | 1. | the underground electric railway of Paris, France, Montreal, Canada, Washington, D.C., and other cities. |
| 2. | subway (def. 1). |

adjective, noun, plural -ros. Informal.| 1. | metropolitan (defs. 1, 2). |
| 2. | metropolis (defs. 1, 2). |
| 3. | (often initial capital letter ) Chiefly Canadian. 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. |
metro- or metr-
pref.
Uterus: metritis.