n. A settled opinion; a principle, maxim, or tenet held as being firmly established.n. A principle or doctrine propounded or received on authority, as opposed to one based on experience or demonstration; specifically, an authoritative religious doctrine.n. Authoritative teaching or doctrine; a system of established principles or tenets, especially religious ones; specifically, the whole body or system of Christian doctrine, as accepted either by the church at large or by any branch of it.n. In the Kantian philosophy, a directly synthetical proposition based on concepts of the understanding.