A small flaw which spoils the appearance of something, a stain, a spot.
A moral defect; a character flaw.
To tarnish (reputation, character, etc.); to defame.
To spoil the appearance of.
Something that makes something else less than perfect; a blemish, impurity, error, etc.
Those qualities or features that are imperfect; the characteristic, state, or quality of being imperfect.