Ru"in*ous (?), a. [L. ruinosus:
cf. F. ruineux. See Ruin.] 1.
Causing, or tending to cause, ruin; destructive; baneful;
pernicious; as, a ruinous project.
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.