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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.

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.

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metro ² American  

[me-troh] / ˈmɛ troʊ /

adjective

1. metropolitan.

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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.

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metro- ⁴ American  

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

   metrorrhagia.

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metro- ⁵ American  

1. a combining form representing metropolis or metropolitan in compound words.

   metroflight; metroland; Metroliner.

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metro- ¹ British  

combining form

1. indicating the uterus

   metrorrhagia

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metro- ² British  

combining form

1. indicating a measure

   metronome

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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

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Other Word Forms

Noun Inflected Forms

• metros
  plural

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

See Examples For:

metro metros

"Sometimes it is hard because most of the day I need to go to safe places, like the metro or somewhere underground," she said.

From BBC ● Sep. 7, 2026

Kyiv mayor Vitali Klitschko said on Telegram he had met with local officials on Monday to discuss changes to security protocols, suggesting one metro line remain open despite strikes.

From Barron's ● Aug. 31, 2026

Equity Residential, which owns about 15,000 apartments in the L.A. metro area, did not respond to a list of questions.

From Los Angeles Times ● Aug. 26, 2026

The chart below shows the decline in manufacturing jobs in the St. Louis metro area, which refers to surrounding regions such as St. Louis County and St. Charles County.

From MarketWatch ● Aug. 22, 2026

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

From "The Line Tender" by Kate Allen

Luxury prices are growing at least three times faster in those Florida metros as they are in the U.S. as a whole, which posted a 5.3% uptick in July.

From The Wall Street Journal ● Sep. 4, 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

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

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

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

Related Words

• rail line
• railway
• subway