mountainous
adjective
moun·tain·ous
ˈmau̇n-tə-nəs 
ˈmau̇nt-nəs
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
In this new evolution phase focused on climate resilience, the city has begun installing sensors in surrounding rural and mountainous areas for early detection of wildfires.
—
Angelica Mari, Forbes.com, 15 Apr. 2025
The princess grew up going on family vacations to the mountainous region, so the trip was a return for her.
—Lissete Lanuza Sáenz, StyleCaster, 15 Apr. 2025
The trip to the Lake District was a return for the Princess of Wales, who grew up going on family vacations to the mountainous region.
—Stephanie Petit, People.com, 14 Apr. 2025
The ammunition consists of countless space rocks, microscopic to mountainous, moving impossibly fast.
—Max Bennett, Discover Magazine, 12 Apr. 2025
See All Example Sentences for mountainous
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Angelica Mari, Forbes.com, 15 Apr. 2025
The princess grew up going on family vacations to the mountainous region, so the trip was a return for her.
—Lissete Lanuza Sáenz, StyleCaster, 15 Apr. 2025
The trip to the Lake District was a return for the Princess of Wales, who grew up going on family vacations to the mountainous region.
—Stephanie Petit, People.com, 14 Apr. 2025
The ammunition consists of countless space rocks, microscopic to mountainous, moving impossibly fast.
—Max Bennett, Discover Magazine, 12 Apr. 2025
See All Example Sentences for mountainous
Cite this Entry
“Mountainous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mountainous. Accessed 23 Apr. 2025.
Copy CitationKids Definition
mountainous
adjective
moun·tain·ous
ˈmau̇nt-ᵊn-əs
-nəs
1
: having many mountains
2
: resembling a mountain : huge
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