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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:

These are the top five metro areas where for-sale listings spent the most days on the market before finding a buyer, according to data as of June 30 provided to MarketWatch by Zillow.

From MarketWatch Jul. 14, 2026

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

Kevin Grolig, a 59-year-old real-estate agent in the D.C. metro area, started noticing that his clients were delaying downsizing their homes because their adult children were still living there.

From The Wall Street Journal Jul. 5, 2026

I worked my way to the metro region section and stopped.

From "The Line Tender" by Kate Allen

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

These are the top five metros where for-sale listings had the highest share of price cuts, according to Zillow.

From MarketWatch Jul. 14, 2026

Midwest and Northeast markets are still leading moderate growth, while many Sun Belt and Western metros see ongoing declines.

From The Wall Street Journal Jun. 30, 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

The numbers for the year through June 2025 indicate the effects of a big immigration slowdown, fewer people bailing on America’s tech epicenter, a modest Midwest rebound and the rising appeal for small southern metros.

From The Wall Street Journal Mar. 27, 2026

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