having an obligation to do something, or having control over or care for someone, as part of one's job or role

the cabinet minister responsible for Education

being the primary cause of something and so able to be blamed or credited for it

Gooch was responsible for 198 of his side's 542 runs

(of a job or position) involving important duties, independent decision-making, or control over others

she had risen rapidly to a high and responsible position in the civil service