Definitions
1.AdjectiveChiefly followed by on or upon: leaning, or lying, reclining, or resting, on something else."the incumbent toe of a bird"
2.AdjectiveOf an anther: lying on the inner side of the filament; also, of a cotyledon: having its back lying against the radicle.
3.AdjectiveOf 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 , of the hind toe of a bird: fully resting on a support."the incumbent toe of a bird"
4.AdjectiveBeing the current holder of an office or a title; specifically , of an ecclesiastical benefice."If the incumbent senator dies, he is replaced by a person appointed by the governor.; Proper behaviour is incumbent on all holders of positions of trust."
5.AdjectiveBeing the current holder of an office or a title; specifically , of an ecclesiastical benefice."If the incumbent senator dies, he is replaced by a person appointed by the governor."
6.AdjectiveOppressive, pressuring.
7.AdjectiveFollowed by on or upon: imposed on one as an obligation, especially due to one's office or position."Proper behaviour is incumbent on all holders of positions of trust."
8.AdjectiveHanging or leaning over.
9.AdjectivePutting much effort into an activity or some work.
10.AdjectiveWeighing on one's mind.
11.NounThe current holder of an office or title; the holder of an ecclesiastical benefice.
12.NounA holder of a position as supplier to a market or market segment that allows the holder to earn above-normal profits.