act done with intent to give some advantage inconsistent with official
duty and the rights of others. It includes bribery, but is more
comprehensive; because an act may be corruptly done, though the
advantage to be derived from it be not offered by another. Sometimes
corruption is understood as something against law; such as, a contract
by which the borrower agreed to pay the lender usurious interest. It is
said, in such case, that it was corruptly agreed, etc.