What does "distain" mean?

Distain: 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. "Distained with dirt and blood." Spenser. [She] hath . . . distained her honorable blood. Spenser. The worthiness of praise distains his worth. Shak.