mountainous
adjective
moun·tain·ous
ˈmau̇n-tə-nəs 
ˈmau̇nt-nəs
mountainously
adverb
mountainousness
noun
Synonyms
- astronomical
- astronomic
- Brobdingnagian
- bumper
- colossal
- cosmic
- cosmical
- cyclopean
- elephantine
- enormous
- galactic
- gargantuan
- giant
- gigantesque
- gigantic
- grand
- herculean
- heroic
- heroical
- Himalayan
- huge
- humongous
- humungous
- immense
- jumbo
- king-size
- king-sized
- leviathan
- mammoth
- massive
- mega
- mighty
- monster
- monstrous
- monumental
- oceanic
- pharaonic
- planetary
- prodigious
- super
- super-duper
- supersize
- supersized
- titanic
- tremendous
- vast
- vasty
- walloping
- whacking
- whopping
Examples of mountainous in a Sentence
the seemingly mountainous obstacles he had to overcome while growing up
Recent Examples on the Web
Development around waterways and in mountainous areas is also putting people in harm’s way and increasing the risk for catastrophic, life-threatening flooding disasters, Caldas, who specializes in community resilience, explained.
—
Mary Gilbert, CNN, 25 Oct. 2024
That turned into a long-running standoff in the rugged mountainous area, where each side has stationed tens of thousands of soldiers backed by artillery, tanks and fighter jets.
—Ashok Sharma, Los Angeles Times, 23 Oct. 2024
In the West, heavy storms are already starting to bring snow to mountainous areas.
—Evan Bush, NBC News, 17 Oct. 2024
It was constructed on Barro Colorado Island, which was mountainous before the canal’s creation in 1914.
—Ken Silverstein, Forbes, 7 Oct. 2024
See all Example Sentences for mountainous 
These examples are automatically compiled from online sources to
illustrate current usage. Opinions expressed in the examples do not represent those of
Merriam-Webster or its editors.
Send us feedback
about these examples.
Mary Gilbert, CNN, 25 Oct. 2024
That turned into a long-running standoff in the rugged mountainous area, where each side has stationed tens of thousands of soldiers backed by artillery, tanks and fighter jets.
—Ashok Sharma, Los Angeles Times, 23 Oct. 2024
In the West, heavy storms are already starting to bring snow to mountainous areas.
—Evan Bush, NBC News, 17 Oct. 2024
It was constructed on Barro Colorado Island, which was mountainous before the canal’s creation in 1914.
—Ken Silverstein, Forbes, 7 Oct. 2024
See all Example Sentences for mountainous
Dictionary Entries Near mountainous
Cite this Entry
“Mountainous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mountainous. Accessed 7 Nov. 2024.
Copy CitationKids Definition
mountainous
adjective
moun·tain·ous
ˈmau̇nt-ᵊn-əs
-nəs
1
: having many mountains
2
: resembling a mountain : huge
Love words? Need even more definitions?
Merriam-Webster unabridged
Share