Supernumerary
Supernumerary is derived from the Latin term supernumerus meaning "above number". Something that is supernumerary exceeds the required or desired number or amount.[1] "Government positions are sometimes filled on a supernumerary basis, and such employees are referred to as supernumeraries. For example, a judge may wish to step down from a regular full-time position and take a position as a supernumerary judge to fill in and relieve the duties of other judges when there is a surplus of work."[2]
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