Definition of supererogatory (adjective)
- more than is needed, desired, or required
- "trying to lose excess weight"; "found some extra change lying on the dresser"; "yet another book on heraldry might be thought redundant"; "skills made redundant by technological advance"; "sleeping in the spare room"; "supernumerary ornamentation"; "it was supererogatory of her to gloat"; "delete superfluous (or unnecessary) words"; "extra ribs as well as other supernumerary internal parts"; "surplus cheese distributed to the needy"
- synonyms: excess, extra, redundant, spare, superfluous, supernumerary, surplus
Source: Princeton University Wordnet