incumbency

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The quality or condition of being incumbent.
2. n. Something incumbent; an obligation.
3. n. The holding of an office or ecclesiastical benefice.
4. n. The term of an office or benefice.

Century Dictionary and Cyclopedia

1. n. The state of being incumbent; a lying or resting on something: as, the incumbency of a burden.
2. n. That which is incumbent; a superincumbent weight, physical, mental, or moral; hence, a grave duty, responsibility, or obligation.
3. n. The state of being an incumbent or holder of an office; the discharge of official or stated functions of any kind, especially of ecclesiastical functions; specifically, the state of holding or being in possession of a church benefice.

Wiktionary

1. n. The state of being incumbent.

GNU Webster's 1913

1. n. The state of being incumbent; a lying or resting on something.
2. n. That which is physically incumbent; that which lies as a burden; a weight.
3. n. That which is morally incumbent, or is imposed, as a rule, a duty, obligation, or responsibility.
4. n. The state of holding a benefice; the full possession and exercise of any office.

WordNet 3.0

1. n. a duty that is incumbent upon you
2. n. the office of an incumbent
3. n. the term during which some position is held