1.NounIn the United States in the 1960s (chiefly 1961), any one of a number of trips taken by bus or other forms of transport through parts of the southern U.S., made by groups of civil rights activists demonstrating their opposition to racial prejudice and segregation. .mw-parser-output .defdate{font-size:smaller}
2.NounA similar excursion undertaken by protesters in Australia in 1965 in opposition to unfair discrimination against Indigenous Australians.