Definition of "injustice"

I was not just the President of Southern Americans or white Americans. I was the President of all Americans. I believed that a huge injustice had been perpetrated for hundreds of years on every black man, woman, and child in the United States. I did not think that our nation could endure much longer as a viable democracy if that injustice were allowed to continue.

1971, Lyndon Johnson, The Vantage Point‎, Holt, Reinhart & Winston, page 39

The game was engulfed in controversy when Rodwell appeared to win the ball cleanly in a midfield challenge with Suarez. The tackle drew an angry response from Liverpool's players- Lucas in particular as Suarez writhed in agony - but it was an obvious injustice when the England Under-21 midfielder was shown the red card.

2011 October 1, Phil McNulty, “Everton 0 - 2 Liverpool”, in BBC Sport‎