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adjective ru·in·ous \ˈrü-ə-nəs\

: causing or likely to cause damage or destruction

: costing far too much money

: falling apart : badly damaged

Full Definition of RUINOUS

:  causing or tending to cause ruin
ru·in·ous·ly adverb
ru·in·ous·ness noun

Examples of RUINOUS

  1. The house has fallen into a ruinous state.
  2. <a ruinous miscalculation of the financial markets left them bankrupt>

First Known Use of RUINOUS

14th century
RUINOUSNESSES Defined for Kids


adjective ru·in·ous \ˈrü-ə-nəs\

Definition of RUINOUS for Kids

:  causing or likely to cause collapse or destruction <a ruinous war>
ru·in·ous·ly adverb


Next Word in the Dictionary: Rul.Previous Word in the Dictionary: ruin marbleAll Words Near: ruinous
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