The act of derogating, partly repealing, or lessening in value; disparagement; detraction; depreciation; -- followed by of, from, or to.
to repeal or abolish a law
Partial abridgement of the effect of a law, which may be express (resulting from a provision of the new law) or tacit (derived from the incompatibility between the content of the new law and that of the derogated one.
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law; "any derogation of the common law is to be strictly construed"
a law is revoked partly ecclesia: "Ekklesia@ is related to klesis@ or calling@: ecclesia is indicative of the calling together of men, synagoga "A body of men united together by the profession of the same Christian Faith , and by participation in the same sacraments, under the governance of lawful pastors, more especially of the Roman Pontiff, the sole vicar of Christ on earth" That is the Church.
A lessening or weakening (of power, authority, position, etc.).
Derogation is the partial revocation of a law, as opposed to abrogation or the total abolition of a law. The term is used in both civil law and canon law. It is sometimes used, loosely, to mean abrogation, as in the legal maxim: Lex posterior derogat priori, i.e. a subsequent law imports the abolition of a previous one.