Origin: From incumbent.
1. The state of being incumbent; a lying or resting on something.
2. That which is physically incumbent; that which lies as a burden; a weight.
3. That which is morally incumbent, or is imposed, as a rule, a duty, obligation, or responsibility. The incumbencies of a family.
4. The state of holding a benefice; the full possession and exercise of any office. These fines are only to be paid to the bishop during his incumbency. (Swift)