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: causing or tending to cause ruin
ruinously
adverb
ruinousness
noun
Examples of ruinous in a Sentence
The house has fallen into a ruinous state.
a ruinous miscalculation of the financial markets left them bankrupt
Recent Examples on the Web
His policy prescriptions are ruinous.
—
Steven Greenhut, Oc Register, 7 Nov. 2025
The radiation effects have been ruinous, according to US government reports cited by the Atomic Heritage Foundation, which said the testing was responsible for 55% of cancers on some of the islands’ northern atolls.
—Brad Lendon, CNN Money, 4 Nov. 2025
There’s nothing ruinous about October’s viewership numbers.
—Barry M. Bloom, Sportico.com, 4 Nov. 2025
Between Helm’s clouds is a ruinous, wrathful force where everything is cunted.
—Literary Hub, 3 Nov. 2025
See All Example Sentences for ruinous
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Steven Greenhut, Oc Register, 7 Nov. 2025
The radiation effects have been ruinous, according to US government reports cited by the Atomic Heritage Foundation, which said the testing was responsible for 55% of cancers on some of the islands’ northern atolls.
—Brad Lendon, CNN Money, 4 Nov. 2025
There’s nothing ruinous about October’s viewership numbers.
—Barry M. Bloom, Sportico.com, 4 Nov. 2025
Between Helm’s clouds is a ruinous, wrathful force where everything is cunted.
—Literary Hub, 3 Nov. 2025
See All Example Sentences for ruinous
Cite this Entry
“Ruinous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ruinous. Accessed 12 Nov. 2025.
Copy CitationKids Definition
ruinous
adjective
ru·in·ous
ˈrü-ə-nəs 
: causing or tending to cause ruin : destructive
ruinously
adverb
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