3. (noun)dirt, filth, grime, soil, stain, grease, grunge the state of being covered with unclean things
4. (noun)mark, stigma, brand, stain a symbol of disgrace or infamy "And the Lord set a mark upon Cain"--Genesis
5. (verb)blot, smear, smirch, spot, stain an act that brings discredit to the person who does it "he made a huge blot on his copybook"
6. (verb)stain color with a liquid dye or tint "Stain this table a beautiful walnut color"; "people knew how to stain glass a beautiful blue in the middle ages"
7. (verb)stain produce or leave stains "Red wine stains the table cloth"
8. (verb)tarnish, stain, maculate, sully, defile make dirty or spotty, as by exposure to air; also used metaphorically "The silver was tarnished by the long exposure to the air"; "Her reputation was sullied after the affair with a married man"
9. (verb)stain color for microscopic study "The laboratory worker dyed the specimen"
6. (verb)stain to discolor by the application of foreign matter; to make foul; to spot; as, to stain the hand with dye; armor stained with blood
7. (verb)stain to color, as wood, glass, paper, cloth, or the like, by processess affecting, chemically or otherwise, the material itself; to tinge with a color or colorscombining with, or penetrating, the substance; to dye; as, to stainwood with acids, colored washes, paint rubbed in, etc.; to stainglass