Criterion
Noun
A Standard, rule, or test on which a decision or judgement can be made.
Synonyms:
Standard, specification, gauge
Antonyms:
Made up, change, possibility
Sentences:
The color of our skin was used as a criterion in the past for many daily activities.
In the past, one of the criterion for voting was your gender.
Racially Segregated Bathroom Prank!