1.Legal or rightful power; a right to command or to act; power exercised buy a person in virtue of his office or trust; dominion; jurisdiction; authorization; as, the authority of a prince over subjects, and of parents over children; the authority of a court. "Thus can the demigod, Authority, Make us pay down for our offense." "By what authority doest thou these things?"
2.Government; the persons or the body exercising power or command; as, the local authorities of the States; the military authorities. (Chiefly in the plural.)
3.The power derived from opinion, respect, or esteem; influence of character, office, or station, or mental or moral superiority, and the like; claim to be believed or obeyed; as, an historian of no authority; a magistrate of great authority.