RUE, verb transitive ru. [Latin rudo, to roar, to bray.]

To lament; to regret; to grieve for; as, to rue the commission of a crime; to rue the day.

Thy will chose freely what it now so justly rues.

RUE, verb intransitive To have compassion. [Not in use.]

RUE, noun Sorrow; repentance. [Not in use.]

RUE, noun ru. [Gr. Latin ]

A plant of the genus Ruta, of several species. The common garden rue is medicinal, as a stimulant and detergent.