\Con*so`ci*a"tion\, n. [L. consociatio.] 1. Intimate union; fellowship; alliance; companionship; confederation; association; intimacy. A friendly consociation with your kindred elements. --Warburton. 2. A voluntary and permanent council or union of neighboring Congregational churches, for mutual advice and co["o]peration in ecclesiastical matters; a meeting of pastors and delegates from churches thus united. Note: In Connecticut some of the Congregational churhes are associated in consociations and the others in conferences.