Incumbency

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

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.