To take away the color of; hence, to weaken the effect of by comparison; cause to pale; outvie.
To tinge with any color different from the natural or proper one; discolor; stain: as, a sword distained with blood.
To blot; sully; defile; tarnish.
the GNU version of the Collaborative International Dictionary of English
transitive verb.
To tinge with a different color from the natural or proper one; to stain; to discolor; to sully; to tarnish; to defile; -- used chiefly in poetry.