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  • metro
    metro
    noun
    the underground electric railway of Paris, France, Montreal, Canada, Washington, D.C., and other cities.
  • metro-
    metro-
    a combining form meaning “measure,” used in the formation of compound words.
Synonyms

metro

1 American  
[me-troh] / ˈmɛ troʊ /

noun

(often initial capital letter)
metros plural
  1. the underground electric railway of Paris, France, Montreal, Canada, Washington, D.C., and other cities.

  2. subway.


metro 2 American  
[me-troh] / ˈmɛ troʊ /

adjective

  1. metropolitan.


noun

metros plural
  1. metropolis.

  2. (often initial capital letter) the government or jurisdiction of a large city.

metro- 3 American  
  1. a combining form meaning “measure,” used in the formation of compound words.

    metronome.


metro- 4 American  
  1. a combining form meaning “uterus,” used in the formation of compound words.

    metrorrhagia.


metro- 5 American  
  1. a combining form representing metropolis or metropolitan in compound words.

    metroflight; metroland; Metroliner.


metro- 1 British  

combining form

  1. indicating the uterus

    metrorrhagia

"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

metro- 2 British  

combining form

  1. indicating a measure

    metronome

"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

metro 3 British  
/ ˈmɛtrəʊ, metro /

noun

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

"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

Other Word Forms

Noun Inflected Forms

Etymology

Origin of metro1

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

Origin of metro2

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

Origin of metro-3

Combining form representing Greek métron measure

Origin of metro-4

Combining form representing Greek mḗtra womb

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Investors poured in nearly $8 billion across 207 deals in the Los Angeles, Long Beach, and Santa Ana metro areas, up 28% from a year earlier, according to PitchBook.

From Los Angeles Times Jul. 10, 2026

San Francisco saw the biggest increase in pending luxury sales among the 50 most populous metro areas over the past year, Redfin found in its data.

From MarketWatch Jul. 9, 2026

A luxury home, according to Redfin, is one in the top 5% of a metro area’s price range; nonluxury homes are in the 35th to 65th percentile.

From MarketWatch Jul. 9, 2026

So in 2017, he left Westminster to head to Manchester and spent nine years as a metro mayor, far from the increasingly dysfunctional national politics.

From The Wall Street Journal Jul. 4, 2026

You can’t tell the whole metro area our book is about Jackson!

From "The Help" by Kathryn Stockett

Louisville/Jefferson County had the highest share of “stale” listings among the 50 most populous metros in America.

From MarketWatch Jul. 14, 2026

These are the top five metros where for-sale listings saw the biggest increase in the number of days spent on the market, according to data provided by Realtor.com.

From MarketWatch Jul. 14, 2026

In many metros, property owners with hefty piles of home equity and no reason to relocate are still sitting it out, giving buyers few options.

From Barron's May 31, 2026

Similar signs of reversal have appeared in some other Midwest metros, including Dayton and Canton, in Ohio, and Racine, Wis.

From The Wall Street Journal May 25, 2026

The search for affordable homes continues to help metros in the Carolinas.

From The Wall Street Journal Mar. 27, 2026

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