What is a freedom ride? Here are some definitions.
Noun
(politics) In the United States during the 1960s, any one of a number of bustrips through parts of the southern US, made by groups of civil rightsactivists demonstrating their opposition to racialprejudice and segregation.
(politics) Any one of similar excursions undertaken by protesters in Australia during the 1960s, in opposition to unfairdiscrimination against Aborigines.