Specifically, a feature that causes someone or something to stand out as being better; a mark of honour, rank, eminence or excellence; being distinguished.
That which distinguishes; a single occurrence of a determining factor or feature, the fact of being divided; separation, discrimination.
The act of distinguishing, discriminating; discrimination.
Those qualities or features that are imperfect; the characteristic, state, or quality of being imperfect.
Something that makes something else less than perfect; a blemish, impurity, error, etc.