∙ A civil designation for somebody who works in a group, association or public office, without forming part of the regular staff; those distinguished from numerary. (For example, supernumerary judges are those who help the regular judges when there is a surplus amount of work.)
∙ An extra or walk-on in a film or play; spear-carrier.
∙ An animal which has not formed a pair bond and is therefore single.
Adjective
∙ Extra; beyond the standard or prescribed amount or number.