Search Result for "freedom rider":
Wordnet 3.0

NOUN (1)

1. one of an interracial group of civil rights activists who rode buses through parts of the South in order to protest racial segregation; 



WordNet (r) 3.0 (2006):

freedom rider
    n 1: one of an interracial group of civil rights activists who
         rode buses through parts of the South in order to protest
         racial segregation