an informal grouping of militant, mainly anarchist, protesters who act together during anti-capitalism, anti-war, etc, protests, often wearing black hoods and black clothing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for black bloc
Contemporary Examples of black bloc
It can feed the fury of black-bloc anarchists and the rage of neo-Nazi gangs.You Say You Want a Revolution?
June 23, 2013