1A role — an assignment or duty; the part one plays or the responsibilities allocated to one within a group.
チーム内で自分の役割を理解することが大切だ。
It's important to understand your role within the team.
父親と母親、それぞれの役割は家庭によって違う。
The roles of father and mother differ depending on the family.
彼はプロジェクトで重要な役割を果たした。
He played an important role in the project.