moun·​tain·​ous | \ ˈmau̇n-tə-nəs How to pronounce mountainous (audio) , ˈmau̇nt-nəs \

Definition of mountainous

1 : containing many mountains
2 : resembling a mountain : huge

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Other Words from mountainous

mountainously adverb
mountainousness noun

Examples of mountainous in a Sentence

the seemingly mountainous obstacles he had to overcome while growing up
Recent Examples on the Web The state has some of the most considerable opportunities to take advantage of wind power in the nation thanks to its mountainous, rural terrain. Josh Siegel, Washington Examiner, "Cynthia Lummis bets on fossil fuels in seeking return to Congress," 9 July 2020 Just north of Taipei, Taiwan, Yangmingshan National Park is a 43-square-mile area known for its relaxing hot springs, mountainous terrain, and endemic birds. National Geographic, "Discover the planet’s last few ‘naturally quiet’ places," 17 June 2020 Also voted one of the world’s best islands, Palawan is beloved for its national parks, which protect both the mountainous island and the emerald-green waters surrounding it. Rebecca Ascher-walsh, Travel + Leisure, "The Top 10 Islands in Asia," 8 July 2020 In a mountainous town of Takayama, several houses were hit by a mudslide, with uprooted trees and other debris scattered around. Washington Post, "Japan battered by more heavy rain, floods, nearly 60 dead," 8 July 2020 Born of volcanism that began shaping the area millions of years ago, this mountainous parcel in northern Arizona is no stranger to fire. Mare Czinar, The Arizona Republic, "Easy Flagstaff hike shows the forest 10 years after Schultz Fire. Here's what to look for," 6 July 2020 Efforts have been complicated by conditions on the ground, however, with flooding and landslides cutting off contact to hundreds of communities in the highly-mountainous region. Yoko Wakatsuki And Ben Westcott, CNN, "Japan floods kill at least 18 people after record-breaking rainfall," 6 July 2020 The congestion in Rio de Janeiro is partly caused by its mountainous geography, funneling cars to a small number of throughways. Dan Kopf, Quartz, "These cities have the world’s worst traffic congestion—but that could change fast," 30 June 2020 Under its calculations, no state is more at risk than West Virginia, where mountainous terrain has historically forced communities to crowd near rivers and creeks in deep valleys. USA Today, "Millions of Americans think they’re safe from flood waters. They aren’t.," 29 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mountainous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of mountainous

14th century, in the meaning defined at sense 1

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Time Traveler for mountainous

Time Traveler

The first known use of mountainous was in the 14th century

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Statistics for mountainous

Last Updated

23 Jul 2020

Cite this Entry

“Mountainous.” Dictionary, Merriam-Webster, Accessed 3 Aug. 2020.

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More Definitions for mountainous


How to pronounce mountainous (audio)

English Language Learners Definition of mountainous

: having many mountains
: extremely large


moun·​tain·​ous | \ ˈmau̇n-tə-nəs How to pronounce mountainous (audio) \

Kids Definition of mountainous

1 : having many mountains mountainous country
2 : like a mountain in size : huge a mountainous pile

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