(an instance of) the absence of justice
unfair treatment; bias
Cases of word usage
1) the strong feeling that comes after being insulted, wrong or because of cruelty and Injustice (and make a person wants to quarrel or fight) (anger)
2) angry, especially because of injustice or undeserved blame etc (indignant)
3) anger caused by feelings of injustice etc (indignation)