From Old French derogacion (French dérogation), from Latin dērogātiō.

derogation (countable and uncountable, plural derogations)

An act which belittles; disparagement.
- 1941, George Ryley Scott, Phallic Worship: A History of Sex and Sex Rites in Relation to the Religions of All Races from Antiquity to the Present Day, London: T. Werner Laurie, page vi:
  Always have the greatest excesses and the most reprehensible practices been committed when backed up by or given the sanction of religion. But all this represents no derogation of the original phallic cult per se. It merely proves that the gods have always been what we have made them.
(law) The act of derogating; the temporary or partial nullification of a law.
- 2019 October, Rhodri Clark, “TfW seeks PRM derogation for Class 37 sets”, in Modern Railways, page 87:
  Two sets of Mk. 2 coaches hauled by Class 37s were introduced on peak Rhymney services during the summer. The coaches do not comply with the Persons with Reduced Mobility (PRM) standards and would therefore need a derogation to continue in passenger service after 31 December.

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