A blemish, spot or stain made by a coloured substance.

(by extension) A stain on someone's reputation or character; a disgrace.

(biochemistry) A method of transferring proteins, DNA or RNA, onto a carrier.

(backgammon) An exposed piece in backgammon.

(transitive) to cause a blot (on something) by spilling a coloured substance.

(intransitive) to soak up or absorb liquid.

(transitive) To dry (writing, etc.) with blotting paper.

(transitive) To spot, stain, or bespatter, as with ink.

(transitive) To impair; to damage; to mar; to soil.

(transitive) To stain with infamy; to disgrace.

(transitive) To obliterate, as writing with ink; to cancel; to efface; generally with out.

(transitive) To obscure; to eclipse; to shadow.

(transitive, MLE) To sell illegal drugs, to deal, to push.