Definitions
1.nounA discoloured spot or area.
2.nounA blemish on one's character or reputation.
3.nounA substance used to soak into a surface and colour it.
4.nounA reagent or dye used to stain microscope specimens so as to make some structures visible.
5.nounAny of a number of non-standard tinctures used in modern heraldry.
6.verbTo discolour."armour stained with blood"
7.verbTo taint or tarnish someone's character or reputation
8.verbTo coat a surface with a stain"the stained glass used for church windows"
9.verbTo become stained; to take a stain.
10.verbTo treat (a microscopic specimen) with a dye, especially one that dyes specific features
11.verbTo cause to seem inferior or soiled by comparison.