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
Two to 4 inches of rain are expected across Northern California, the NWS Sacramento office posted on X, as well as heavy snow in mountainous areas.
—
Anders Fogh Rasmussen, Newsweek, 4 Feb. 2025
But there, too, Turkey’s drones and a ring of forward bases have hemmed in the PKK, preventing the group from using northern Iraq’s mountainous terrain to stage attacks into Turkey.
—Halil Karaveli, Foreign Affairs, 3 Feb. 2025
This month the three largest Los Angeles–area fires have created nearly 50,000 acres of fresh burn scar, Lund notes, and some of that scar is in mountainous terrain that facilitates mudslides.
—Meghan Bartels, Scientific American, 24 Jan. 2025
Space aside, the room’s greatest feature is its massive view of the mountainous landscape.
—Demetrius Simms, Robb Report, 20 Jan. 2025
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Anders Fogh Rasmussen, Newsweek, 4 Feb. 2025
But there, too, Turkey’s drones and a ring of forward bases have hemmed in the PKK, preventing the group from using northern Iraq’s mountainous terrain to stage attacks into Turkey.
—Halil Karaveli, Foreign Affairs, 3 Feb. 2025
This month the three largest Los Angeles–area fires have created nearly 50,000 acres of fresh burn scar, Lund notes, and some of that scar is in mountainous terrain that facilitates mudslides.
—Meghan Bartels, Scientific American, 24 Jan. 2025
Space aside, the room’s greatest feature is its massive view of the mountainous landscape.
—Demetrius Simms, Robb Report, 20 Jan. 2025
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 8 Feb. 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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