ultimate
adjective
uk/ˈʌltɪmət/ uslast in a series:
The CEO is responsible for making the ultimate decision.
We are stopping off in Brussels and Cairo, but our ultimate destination is Chennai.
having more importance or more influence over what happens than all others:
ultimate goal/aim Only one in 100 workers will achieve the ultimate goal and retire on two-thirds of final salary.
The manager has ultimate responsibility for all investment advisory services.
The corporate HQ in the UK has ultimate authority over all our overseas operations.