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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:

Since Wednesday, authorities have closed 16 Delhi metro stations in central Delhi.

From BBC Jul. 23, 2026

Median renter income in New York City increased by 1.8%, 2024 census data shows, while rent inflation for the metro area rose by 4.7%.

From The Wall Street Journal Jul. 22, 2026

Below are the 10 U.S. metro areas where the largest share of builders have cut prices on new homes, according to an analysis from Realtor.com.

From MarketWatch Jul. 16, 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

The entire state of Idaho had one area code; the Chicago metro area alone had three.

From "Geeks: How Two Lost Boys Rode the Internet Out of Idaho" by Jon Katz

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

Orlando was followed by three other Florida metros: North Port, Miami and Cape Coral.

From The Wall Street Journal Jun. 30, 2026

These metros largely dot the Sunbelt, a geographic area that stretches across the southern U.S. and is known for its abundance of home building.

From Barron's Apr. 3, 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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