From en.wiktionary.org:
[Blackball]
** English
*** Etymology
[en]
From [en].
*** Pronunciation
- [blăk'bôl'] , [en]
- [en]
- [en]
*** Noun
[~]
1. [en] A rejection ; a vote against admit ting someone.
2. [en] A black ball used to indicate such a negative vote .
3. [en] A kind of large black sweet , a black-colored gobstopper .
4. A substance for black ing shoes, boots, etc. or for taking impressions of engraved work.
5. [en] A game, a standardized version of the English version of eight-ball .
*** Verb
[en-verb]
1. [en] To vote against, especially in an exclusive organization.
2. * [en]
3. [en] To ostracize .
4. * [en]
5. * [en]
6. * [en-GB]
**** Derived terms
[en]
[en]