This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Imposed as an obligation or duty; obligatory: felt it was incumbent on us all to help.

adj. Lying, leaning, or resting on something else: incumbent rock strata.

adj. Currently holding a specified office: the incumbent mayor.

n. A person who holds an office or ecclesiastical benefice: The incumbent was reelected to another term.

adj. Imposed on someone as an obligation, especially due to one's office.

adj. Resting on something else.

adj. Being the current holder of an office or a title.

n. The current holder of an office, such as ecclesiastical benefice or an elected office.

n. A holder of a position as supplier to a market or market segment that allows the holder to earn above-normal profits.

adj. Lying; resting; reclining; recumbent; superimposed; superincumbent.

adj. Lying, resting, or imposed, as a duty or obligation; obligatory; always with on or upon.

adj. Leaning or resting; -- said of anthers when lying on the inner side of the filament, or of cotyledons when the radicle lies against the back of one of them.

adj. Bent downwards so that the ends touch, or rest on, something else.

n. A person who is in present possession of a benefice or of any office.

Lying or resting on something.

Specifically

Lying, leaning, or resting lengthwise, in whole or in part, upon a surface to which there is only one point of actual attachment or none.

Lying or resting as a duty or obligation; imposed, and pressing to performance.

n. One who discharges stated functions; the holder of an office of any kind; especially, one who discharges ecclesiastical functions; one who holds a benefice.

In geology, resting upon: said of one series of strata which is supported by a subjacent one.

n. the official who holds an office

adj. currently holding an office

adj. lying or leaning on something else

adj. necessary (for someone) as a duty or responsibility; morally binding

"Khosla went after what he called "incumbent capitalism," in which government policy and incentives are designed not to encourage competition and innovation, but to protect entrenched incumbent interests, with coal, oil, nuclear, and utility monopolies being the most spectacular beneficiaries of this bias against innovation."

current    superjacent    necessary   

binding   

lying    resting    reclining    recumbent    superimposed   

indebted    liable    applicable    advantageous    rector