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noun, plural met·ros. (often initial capital letter)
  1. the underground electric railway of Paris, France, Montreal, Canada, Washington, D.C., and other cities.
  2. subway(def 1).

Origin of metro1

1900–05; < French métro, short for chemin de fer métropolitain metropolitan railroad


  1. metropolitan(defs 1, 2).
noun, plural met·ros.
  1. metropolis(defs 1, 2).
  2. (often initial capital letter) Chiefly Canadian. the government or jurisdiction of a large city.

Origin of metro2

First recorded in 1900–05; by shortening; or independent use of metro-3


  1. a combining form meaning “measure,” used in the formation of compound words: metronome.

Origin of metro-1

combining form representing Greek métron measure


  1. a combining form meaning “uterus,” used in the formation of compound words: metrorrhagia.
Also especially before a vowel, metr-.

Origin of metro-2

combining form representing Greek mḗtra womb


  1. a combining form representing metropolis or metropolitan in compound words: metroflight; metroland; Metroliner.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for metro

Contemporary Examples

Historical Examples

  • A subway is always a tube, or the underground, or the Metro.

    The American Language

    Henry L. Mencken

  • "There's a new picture at the Metro," he said as quietly as he could.

    No Strings Attached

    Lester del Rey

  • I went down into the Metro and in time arrived at the station.

    A "Y Girl in France</p>

    Katherine Shortall

  • (Metro de drapo signifus metron, kiu kuŝis sur drapo, aŭ kiu estas uzata por drapo).

  • (Metro de drapo would mean a yard-measure which was lying on cloth, or which is used for cloth).

British Dictionary definitions for metro


mtro (French metro)

noun plural -ros
  1. an underground, or largely underground, railway system in certain cities, esp in Europe, such as that in Paris

Word Origin

C20: from French, short for chemin de fer métropolitain metropolitan railway


before a vowel metr-

combining form
  1. indicating the uterusmetrorrhagia

Word Origin

from Greek mētra womb


combining form
  1. indicating a measuremetronome

Word Origin

from Greek metron measure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for metro



Paris underground, 1904, from French abbreviation of Chemin de Fer Métropolitain "Metropolitan Railway" (see metropolitan (adj.)). French chemin de fer "railroad" is literally "iron road."

Online Etymology Dictionary, © 2010 Douglas Harper

metro in Medicine


  1. Uterus:metritis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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