Meanings
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1
adj
like a mountain in size and impressiveness
Mountainous waves.
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2
adj
Having many mountains; characterized by mountains; of the nature of a mountain; rough (terrain); rocky.
[Water vapour bubbles] hit againſt the ſides of the more eminent and Mountainous Places, of the Globe, and by this Concuſſion are condenſed, and thus become heavier than the Air they ſvvom in, and ſo gleet dovvn the rocky Caverns of theſe Mountains, […].
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3
adj
Resembling a mountain, especially in size; huge; towering.
But the added size did not give them an advantage this time. Not when Kanter and Adams, two mountainous players, could match the Knicks’ girth with their own.
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4
adj
Very difficult.
As Brazil faced the mountainous task of completing an Olympic venue before the opening ceremony, Chinese netizens got busy molehilling a remark by a Rio construction manager about their China supplier.
Thesaurus
Etymology
From mountain + -ous after Middle French montagneux, from Late Latin montāniōsus, from montānia, from Latin montem (“mountain”).