noun
(countable) A rejection; a vote against admitting someone.
(countable) A black ball used to indicate such a negative vote.
(countable) A kind of large black sweet, a black-colored gobstopper.
A substance for blacking shoes, boots, etc. or for taking impressions of engraved work.
(uncountable) A game, a standardized version of the English version of eight-ball.
verb
(transitive) To vote against, especially in an exclusive organization.
(transitive) To ostracize.