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
States from East to West coast and all between feature, with mountainous ski chalets to tropical mansions making the top ten.
—
Stacey Leasca, Travel + Leisure, 28 May 2024
However, the helicopter the group was traveling in crashed in foggy conditions in a mountainous area in the northwest of the country near the border with Azerbaijan.
—James Hider, NPR, 20 May 2024
The incident unfolded in the mountainous area of Kalibar and Warzghan in central Iran.
—Bill Hutchinson, ABC News, 19 May 2024
But there is a reason that each year thousands of visitors from every continent come to this mountainous Basque landscape to study factories like this one.
—Erika Page, The Christian Science Monitor, 13 May 2024
See all Example Sentences for mountainous 
Stacey Leasca, Travel + Leisure, 28 May 2024
However, the helicopter the group was traveling in crashed in foggy conditions in a mountainous area in the northwest of the country near the border with Azerbaijan.
—James Hider, NPR, 20 May 2024
The incident unfolded in the mountainous area of Kalibar and Warzghan in central Iran.
—Bill Hutchinson, ABC News, 19 May 2024
But there is a reason that each year thousands of visitors from every continent come to this mountainous Basque landscape to study factories like this one.
—Erika Page, The Christian Science Monitor, 13 May 2024
See all Example Sentences for mountainous
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'mountainous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near mountainous
Cite this Entry
“Mountainous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mountainous. Accessed 6 Jun. 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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