holding an indicated position, role, office, etc., currently

the incumbent officers of the club.

obligatory (often fol. by on or upon )

a duty incumbent upon me.

Archaic . resting, lying, leaning, or pressing on something

incumbent upon the cool grass.

the holder of an office

The incumbent was challenged by a fusion candidate.

British . a person who holds an ecclesiastical benefice.

adjective

binding , compelling , necessary , urgent

noun

official , occupant