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 add one's own name to the list of people who are participating in something (including amateur, but not professional, teams)
To agree to purchase some good or service.
To add a name to the list of people who are participating in something.