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
Some Puerto Ricans live in rural, mountainous areas or off-coast islands without acute care access, according to Peña.
—
John Yoo and John Shu, Newsweek, 23 Jan. 2025
Wind gusts up to 50 mph were forecast with isolated gusts of 75 mph predicted for mountainous areas.
—Christopher Cann, USA TODAY, 22 Jan. 2025
Celebrations will take place on Thursday in other parts of the country stretching from the eastern coastal city of Pattaya to the mountainous northern city of Chiang Mai.
—Kocha Olarn, CNN, 22 Jan. 2025
The sophistication of Monaco during the day — with its yachts, supercars racing through a mountainous backdrop and plush casinos in the day — made way for stodgy nighttime entertainment.
—Jacob Tanswell, The Athletic, 21 Jan. 2025
See all Example Sentences for mountainous 
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John Yoo and John Shu, Newsweek, 23 Jan. 2025
Wind gusts up to 50 mph were forecast with isolated gusts of 75 mph predicted for mountainous areas.
—Christopher Cann, USA TODAY, 22 Jan. 2025
Celebrations will take place on Thursday in other parts of the country stretching from the eastern coastal city of Pattaya to the mountainous northern city of Chiang Mai.
—Kocha Olarn, CNN, 22 Jan. 2025
The sophistication of Monaco during the day — with its yachts, supercars racing through a mountainous backdrop and plush casinos in the day — made way for stodgy nighttime entertainment.
—Jacob Tanswell, The Athletic, 21 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 30 Jan. 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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