"Incumbent" is a word in LAW AND LEGAL, ENGLISH

A person who is in pres-ent possession of an office; one who is le-gally authorized to discharge the duties of an office. State v. McCoilister, 11 ohio, 50; gtate v. Blakemore, 104 Mo. 340, 15 S. W. 960.

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

Bent downwards so that the ends touch, or rest on,
something else; as, the incumbent toe of a bird.

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

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.

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