Meaning

• A discoloured spot or area.

• A blemish on one's character or reputation.

• A substance used to soak into a surface and colour it.

• A reagent or dye used to stain microscope specimens so as to make some structures visible.

• Any of a number of non-standard tinctures used in modern heraldry.

Meaning

• To discolour.

  "armour stained with blood"

• To taint or tarnish someone's character or reputation

• To coat a surface with a stain

  "the stained glass used for church windows"

• To become stained; to take a stain.

• To treat (a microscopic specimen) with a dye, especially one that dyes specific features

• To cause to seem inferior or soiled by comparison.