1. not based on or behaving according to the principles of equality and justice; lacking fairness
It is unfair to judge someone without knowing the facts.
É injusto julgar alguém sem conhecer os fatos.
2. marked by injustice, partiality, or deception
The referee made an unfair decision during the match.
O árbitro tomou uma decisão injusta durante a partida.
3. not equitable in business or commercial dealings
The contract contained unfair terms that favored the company.
O contrato continha termos injustos que favoreciam a empresa.