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megacity

American  
[meg-uh-sit-ee] / ˈmɛg əˌsɪt i /

noun

  • megacities
    plural
  1. a city having a population of one million or more.


megacity British  
/ ˈmɛɡəˌsɪtɪ /

noun

  1. a city with over 10 million inhabitants

"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 megacity

First recorded in 1965–70; mega- + city


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:

Jiang became the party chief of a neighboring city in 2022 and became vice mayor of the inland megacity of Chongqing the next year.

From The Wall Street Journal ● Jun. 28, 2026

It survived colonial rule, a bloodied partition, the tumult of independence and Delhi's transformation into a sprawling megacity.

From BBC ● May 25, 2026

Soaring black-market prices of cooking gas in India's capital are pushing poorer families back to wood and coal, raising health risks and worsening air quality in the highly polluted megacity.

From Barron's ● Mar. 24, 2026

Plans for the Neom megacity, billed as the world’s most audacious venture in urban design, have been scaled back.

From The Wall Street Journal ● Feb. 9, 2026

The hosts and Jeff discuss the many reasons Mohammed bin Salman’s outlandish plans for a megacity in the desert have failed to be realized.

From Slate ● Nov. 8, 2025

In the industrious south, automation is reshaping factories and supply chains, and megacities like Chongqing have become the stuff of influencers' feeds.

From BBC ● May 12, 2026

China has been recruiting top scientists back home with offers of generous funding, cutting-edge labs, social stability and high standards of living in megacities.

From The Wall Street Journal ● Apr. 19, 2026

From red-robed Buddhist monks in the snowy Himalayas, to political exiles in megacities across South Asia, to refugees in Australia, Europe and North America, voting will take place in 27 countries -- but not China.

From Barron's ● Feb. 1, 2026

They focused on the Yangtze River Delta and Pearl River Delta, two areas that are home to several megacities and key industrial zones.

From Science Daily ● Oct. 23, 2025

Just as the East Coast developed into a string of megacities linked by Amtrak, California is evolving into its own megalopolis.

From Los Angeles Times ● Jun. 16, 2025

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