Injustice is the lack of or opposition to
justice, either in reference to a particular event or act, or as a larger
status quo.
The term generally refers to the misuse, abuse, neglect, or malfeasance of a
justice system, with regard to a particular case or context, such that the legal status quo represents a systemic failure to serve the cause of justice.
According to Plato, he doesn't know what justice is but he knows what justice is not.
Other usage