From WordNet (r) 3.0 (2006):
rue
n 1: European strong-scented perennial herb with grey-green
bitter-tasting leaves; an irritant similar to poison ivy
[syn: rue, herb of grace, Ruta graveolens]
2: leaves sometimes used for flavoring fruit or claret cup but
should be used with great caution: can cause irritation like
poison ivy
3: sadness associated with some wrong done or some
disappointment; "he drank to drown his sorrows"; "he wrote a
note expressing his regret"; "to his rue, the error cost him
the game" [syn: sorrow, regret, rue, ruefulness]
4: (French) a street or road in France
v 1: feel remorse for; feel sorry for; be contrite about [syn:
repent, regret, rue]