adunationEtymologyFrom Latin adūnātiō, from ad + ūnus (“one”).adunation means the act of uniting; union. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounThe act of uniting; union.“[W]e are taught, that all the body of holy actions and miniſteries are to unite in production of the event, and that without that adunation one thing alone cannot operate: [...]”