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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:

In the Pakistani megacity of Karachi, an AFP journalist witnessed hundreds of pro-Iranian protesters trying to enter the US consulate, prompting clashes with police.

From Barron's Mar. 1, 2026

In the high-tech megacity of Shenzhen in southern China, Prince Andrew looked on as dancers spun and waved streamers to entertain an audience of investors and innovators.

From BBC Feb. 28, 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

Tourists are flocking to Chongqing, China’s megacity that’s straight out of sci-fi.

From The Wall Street Journal Oct. 3, 2025

The plan is for power lines to funnel this green energy to the megacities of Guangzhou, Shenzhen and Chongqing.

From BBC May 31, 2026

Astronomical ticket prices, far exceeding those charged in Qatar in 2022, have also drawn the ire of fans already facing elevated costs, particularly in megacities New York and Los Angeles.

From Barron's Apr. 29, 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

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

Los Angeles is just one of two megacities in the world that are home to a big cat; the other is Mumbai, in India, where leopards prowl the streets.

From Los Angeles Times Dec. 7, 2024

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