Injustice, n.
Etymology: [F. injustice, L. injustitia. See In- not, and Justice, and cf. Unjust.]
1. Want of justice and equity; violation of the rights of another or others; iniquity; wrong; unfairness; imposition. If this people [the Athenians] resembled Nero in their extravagance, much more did they resemble and even exceed him in cruelty and injustice. Burke.
2. An unjust act or deed; a sin; a crime; a wrong. Cunning men can be guilty of a thousand injustices without being discovered, or at least without being punished. Swift.
Shades of meaning
Injustice is a violation or denial of justice, an act or omission that is contrary to equity or justice; as, the injustice of unequal taxes. In legal usage a wrong involves injury to person, property, or reputation, as the result of evil intent; injustice applies to civil damage or loss, not necessarily involving injury to person or property, as by misrepresentation of goods which does not amount to a legal warranty. In popular usage, injustice may involve no direct injury to person, property, interest, or character, and no harmful intent, while wrong always involves both; one who attributes another's truly generous act to a selfish motive does him an injustice. Iniquity, in the original sense, is a want of or a deviation from equity; but it is now applied in the widest sense to any form of ill-doing. Compare synonyms for criminal; sin.