1. The portion, right, or responsibility that rightfully belongs to someone; one's due share or obligation
He received what was due to him after years of hard work.
Ele recebeu o que lhe cabia após anos de trabalho árduo.
2. The appropriate or expected action or behavior for someone in a given situation
It was his responsibility to do what was expected of him.
Era seu dever fazer o que lhe cabia.