To ostracize.
To vote against, especially in an exclusive organization.
A black ball used to indicate such a negative vote.
A rejection; a vote against admitting someone.
A kind of large black sweet; a niggerball.
A game, a standardized version of the English version of eight-ball.
A substance for blacking shoes, boots, etc. or for taking impressions of engraved work.
To disallow.
To reject an option from a list of possibilities.
To make something impossible.
To cross an item out by drawing a straight line through it, as with a ruler.
To make unavailable.