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
This heavy rainfall could also lead to mudslides, especially in the mountainous terrain of Jamaica and southern Cuba.
—
Mary Gilbert, CNN, 4 Nov. 2024
In North Carolina, torrential rains from the storm combined with the mountainous terrain of the western part of the state to create catastrophic flooding.
—Nate Trela, USA TODAY, 29 Oct. 2024
Much of it is remote and dangerous, including desert and mountainous terrain where summer heat regularly exceeds 120 degrees.
—Bethany Blankley | The Center Square, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 26 Oct. 2024
Other variables, like the roughness of the landscape and mountainous terrain, don’t seem to have a significant effect one way or the other.
—Cody Cottier, Discover Magazine, 21 Oct. 2024
See all Example Sentences for mountainous 
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Mary Gilbert, CNN, 4 Nov. 2024
In North Carolina, torrential rains from the storm combined with the mountainous terrain of the western part of the state to create catastrophic flooding.
—Nate Trela, USA TODAY, 29 Oct. 2024
Much of it is remote and dangerous, including desert and mountainous terrain where summer heat regularly exceeds 120 degrees.
—Bethany Blankley | The Center Square, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 26 Oct. 2024
Other variables, like the roughness of the landscape and mountainous terrain, don’t seem to have a significant effect one way or the other.
—Cody Cottier, Discover Magazine, 21 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 30 Nov. 2024.
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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