Read the dictionary definition of stain. All definitions for this word.
1. an act that brings discredit to the person who does it
1. he made a huge blot on his copybook
2. a soiled or discolored appearance
1. the wine left a dark stain
3. a symbol of disgrace or infamy
1. And the Lord set a mark upon Cain
4. the state of being covered with unclean things
5. (microscopy) a dye or other coloring material that is used in microscopy to make structures visible
6. color for microscopic study
1. The laboratory worker dyed the specimen
7. color with a liquid dye or tint
1. Stain this table a beautiful walnut color
2. people knew how to stain glass a beautiful blue in the middle ages
8. produce or leave stains
1. Red wine stains the table cloth
9. make dirty or spotty, as by exposure to air; also used metaphorically
1. The silver was tarnished by the long exposure to the air
2. Her reputation was sullied after the affair with a married man