incumbent Definition

incumbent
adj

rather formal:
1. Imposed as a duty or heavy responsibility on them.

Example: feel it incumbent upon me to defend him
Thesaurus: necessary, mandatory, compulsory, obligatory, binding, prescribed.
Form: incumbent on someone (especially)
Form: incumbent upon someone
2. Currently occupying a specified position or office.

Example: the incumbent bishop

noun

1. A holder of an office, especially a church office or benefice.

Etymology: 15c: from Latin incumbere to lie, lean or press on.