After a night of storm so ruinous. --Milton.
2. Characterized by ruin; ruined; dilapidated; as, an
edifice, bridge, or wall in a ruinous state.
3. Composed of, or consisting in, ruins.
Behold, Damascus . . . shall be a ruinous heap.
--Isa. xvii.
1.
Syn: Dilapidated; decayed; demolished; pernicious;
destructive; baneful; wasteful; mischievous. --
{Ru"in*ous*ly}, adv. -- {Ru"in*ous*ness}, n.