1. Actions, conduct, or manner of acting that is unusual, rare, or not typical of most people
His uncommon behavior at the meeting surprised everyone.
Seu comportamento incomum na reunião surpreendeu todos.
2. Conduct that deviates from social norms or expected standards
The child's uncommon behavior in public made the parents concerned.
O comportamento incomum da criança em público preocupou os pais.