1. Behavior that deviates significantly from the norm or expected standard; deviant or abnormal conduct
The aberrant behavior of the employee led to disciplinary action.
O comportamento aberrante do funcionário levou a medidas disciplinares.
2. In biology and psychology, behavior that is atypical or different from what is considered normal for a species or population
Scientists observed aberrant behavior in the laboratory animals.
Os cientistas observaram comportamento aberrante nos animais de laboratório.