Suitableness; the relation of agreement between things. There is no congruity between a mean subject and a lofty style; but an obvious congruity between an elevated station and dignified deportment.

Fitness. A whole sentence may fail of its congruity by wanting a particle.

Reason; consistency; propriety.

In school divinity, the good actions which are supposed to render it meet and equitable that God should confer grace on those who perform them. The merit of congruity is a sort of imperfect qualification for the gift and reception of Gods grace.

In geometry, figures or lines, which when laid over one another, exactly correspond, are in congruity.&