incumbent

Short definition from Wiktionary

Adjective

1. 1
   Chiefly followed by on or upon: leaning, or lying, reclining, or resting, on something else.
2. 2
   Chiefly followed by on or upon: leaning, or lying, reclining, or resting, on something else: Of an anther: lying on the inner side of the filament; also, of a cotyledon: having its back lying against the radicle.
3. 3
   Chiefly followed by on or upon: leaning, or lying, reclining, or resting, on something else: Of a body part such as a hair, spine, or wing: bent downwards or otherwise positioned so that it, or part of it, rests on or touches something else; specifically (ornithology), of the hind toe of a bird: fully resting on a support.
4. 4
   Being the current holder of an office or a title; specifically (Christianity, obsolete), of an ecclesiastical benefice.
5. 5
   Oppressive, pressuring.
6. 6
   Followed by on or upon: imposed on one as an obligation, especially due to one's office or position.
7. 7
   Hanging or leaning over.
8. 8
   Putting much effort into an activity or some work.
9. 9
   Weighing on one's mind.

Noun

1. 1
   The current holder of an office or title; (specifically, Christianity) the holder of an ecclesiastical benefice.
2. 2
   A holder of a position as supplier to a market or market segment that allows the holder to earn above-normal profits.