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Rh in defining doctrines to be held by the whole Church.

The definition therefore includes, and includes only, the solemn acts of the Pontiff as the supreme Doctor of all Christians, defining doctrines of faith and morals, to be held by the whole Church.

Now the word doctrine here signifies a revealed truth, traditionally handed down by the teaching authority, or magisterium infallibile, of the Church; including any truth which, though not revealed, is yet so united with a revealed truth as to be inseparable from its full explanation, and defence.

And the word definition here signifies the precise judgment or sentence in which any such traditional truth of faith or morals may be authoritatively formulated; as, for instance, the consubstantiality of the Son, the procession of the Holy Ghost by one only Spiration from the Father and the Son, the Immaculate Conception, and the like.

The word 'definition' has two senses, the one forensic and narrow, the other wide and common; and this in the present instance is more correct. The forensic or narrow sense confines its meaning to the logical act of defining by genus and differentia. But this sense is proper to dialectics and disputations, not to the acts of Councils and Pontiffs. The wide and common sense is that of an authoritative termination of questions which have been in doubt and debate, and therefore of the judgment or sentence thence resulting. When the second Council of Lyons says, 'Si quæ subortæ fuerint fidei quæstiones suo judicio debere definiri,' it means that the questions