Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for ruinous from the 1913 edition of Webster's Revised Unabridged Dictionary. Define ruinous using one of the most comprehensive free online dictionaries on the web.

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Part of Speech: Noun
Results: 3
1. Causing, or tending to cause, ruin; destructive; baneful; pernicious; as, a ruinous project.
3. Composed of, or consisting in, ruins.
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