Dictionary.net

• movement in the United States beginning in the 1960s and led primarily by Blacks in an effort to establish the civil rights of individual Black citizens

2006 - WordNet 3.0
By Princeton University

• movement in the United States beginning in the 1960s and led primarily by Blacks in an effort to establish the civil rights of individual Black citizens

2011 - English Dictionary Database
By DataStellar Co., Ltd