De*rog"a*to*ry (?), a. Tending to derogate, or lessen in value; expressing derogation; detracting; injurious; -- with from, to, or unto.

Acts of Parliament derogatory from the power of subsequent Parliaments bind not.

His language was severely censured by some of his brother peers as derogatory to their order.

Derogatory clause in a testament (Law), a sentence of secret character inserted by the testator alone, of which he reserves the knowledge to himself, with a condition that no will he may make thereafter shall be valid, unless this clause is inserted word for word; -- a precaution to guard against later wills extorted by violence, or obtained by suggestion.