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
The territory consists of dense rainforest and mountainous terrain that stretches from the Caribbean coast almost across the country to the Pacific Ocean.
—
Adam Williams, NPR, 11 Jan. 2025
On Friday morning, more than 8,200 customers were without electricity as SDG&E de-energized some circuits in backcountry and mountainous communities such as Alpine, Julian, Jacumba and the Viejas reservation.
—Rob Nikolewski, San Diego Union-Tribune, 10 Jan. 2025
New smoke activity to the southeast appeared on the mountainous horizon, with helicopters and large airplanes circulating it.
—Jourdan Rodrigue, The Athletic, 10 Jan. 2025
No information was immediately available from the remote, mountainous areas of Nepal closer to the epicenter.
—Ken Moritsugu, Los Angeles Times, 7 Jan. 2025
See all Example Sentences for mountainous 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Adam Williams, NPR, 11 Jan. 2025
On Friday morning, more than 8,200 customers were without electricity as SDG&E de-energized some circuits in backcountry and mountainous communities such as Alpine, Julian, Jacumba and the Viejas reservation.
—Rob Nikolewski, San Diego Union-Tribune, 10 Jan. 2025
New smoke activity to the southeast appeared on the mountainous horizon, with helicopters and large airplanes circulating it.
—Jourdan Rodrigue, The Athletic, 10 Jan. 2025
No information was immediately available from the remote, mountainous areas of Nepal closer to the epicenter.
—Ken Moritsugu, Los Angeles Times, 7 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 18 Jan. 2025.
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