Definition of "supererogatory"
adjective
comparative more supererogatory, superlative most supererogatory
Pertaining to supererogation; doing more than is required, especially with reference to good works in Roman Catholicism
Quotations
"In now you come," she ordered, "and we make love." That seemed supererogatory to David Jones, who, under the gaze of the painted deer, got in there and did as he was told.
1989, Anthony Burgess, “Un”, in Any Old Iron, London: Hutchinson; republished New York, N.Y.: Washington Square Press, Pocket Books, 1990, page 20