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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:

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

In western regions of New York, the air quality on 16 July was considered "very unhealthy", while in the New York City metro area the air quality is "unhealthy".

From BBC Jul. 17, 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

It was a rare, unexplained, glitch in a system that blares out warnings of incoming attacks multiple times a day through loudspeaker announcements on the street and metro, and the collective ping of phone notifications.

From Barron's Jul. 9, 2026

It took an hour to get there, and by now I was up near the Ocala National Forest, not really even the Orlando metro area anymore.

From "Paper Towns" by John Green

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

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

From MarketWatch Jul. 14, 2026

Equity Residential, started by the late billionaire real-estate investor Sam Zell, has properties concentrated in major coastal markets in the U.S. as well as major metros including Atlanta, Austin and Denver.

From The Wall Street Journal May 20, 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 search for affordable homes continues to help metros in the Carolinas.

From The Wall Street Journal Mar. 27, 2026

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