All 4 Uses

apartheid
in
I Am Prepared to Die
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The change was embodied in a decision which was taken to protest against apartheid legislation by peaceful, but unlawful, demonstrations against certain laws.†
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apartheid = a system that unfairly treats people of a different race
More than 8,500 people defied apartheid laws and went to jail.†
Attacks on the economic life-lines of the country were to be linked with sabotage on Government buildings and other symbols of apartheid.†
Although there is a universal condemnation of apartheid, the communist bloc speaks out against it with a louder voice than most of the white world.†

Definitions:

(1) (apartheid)
a system that unfairly treats people of a different race in laws, jobs, and politics
(2) (meaning too rare to warrant focus)