Supernumeraries

noun

1. A person who works in a group, association, or public office without forming part of the regular staff (the numerary).

   "The judge was a supernumerary, helping the regular judges whenever there was a surplus amount of work."

2. An extra or walk-on, often non-speaking, in a film or play; a spear carrier.
3. Something which is beyond the prescribed or standard amount or number.
4. An animal which has not formed a pair bond and is therefore single.
5. A married man or woman who is a secular member of Opus Dei, a Roman Catholic religious institution.