adjective \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


Next Word in the Dictionary: rulable
Previous Word in the Dictionary: ruin marble
All Words Near: ruinous

Seen & Heard

What made you want to look up ruinous? Please tell us where you read or heard it (including the quote, if possible).