· a soiled or discolored appearance; "the wine left a dark stain"

Synonym(s): discoloration, discolouration

Hypernym(s): appearance, visual_aspect

· (microscopy) a dye or other coloring material that is used in microscopy to make structures visible

Hypernym(s): coloring_material, colouring_material, color, colour

· the state of being covered with unclean things

Synonym(s): dirt, filth, grime, soil, grease, grunge

Hypernym(s): dirtiness, uncleanness

· a symbol of disgrace or infamy; "And the Lord set a mark upon Cain"--Genesis

Synonym(s): mark, stigma, brand

Hypernym(s): symbol

· an act that brings discredit to the person who does it; "he made a huge blot on his copybook"

Synonym(s): blot, smear, smirch, spot

Hypernym(s): mistake, error, fault

· 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"

Hypernym(s): dye

· produce or leave stains; "Red wine stains the table cloth"

Hypernym(s): change, alter, modify

· 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"

Synonym(s): tarnish, maculate, sully, defile

Hypernym(s): spot, fleck, blob, blot

· color for microscopic study; "The laboratory worker dyed the specimen"

Hypernym(s): dye