supernumerary (noun) /ˌsupɚˈn(j)uməˌɹɛɹi/
1
(film, theater) An extra or walk-on, often non-speaking, in a film or play; a spear carrier.
2
Something which is beyond the prescribed or standard amount or number.
3
(zoology) An animal which has not formed a pair bond and is therefore single.
4
(Roman Catholicism) A married man or woman who is a secular member of Opus Dei, a Roman Catholic religious institution.
supernumerary (adjective) /ˌsupɚˈn(j)uməˌɹɛɹi/
1
Greater in number than.
2
An adjective "supernumerary" refers to something that is beyond the prescribed or standard amount or number, or an additional organ or structure in biology.
3
Beyond what is necessary; redundant.