Adjective
postconciliar (comparative more postconciliar, superlative most postconciliar)
In or of the period following an ecclesiastical council, especially the Second Vatican Council.
Antonym: preconciliar
A number of topics were reduced to statements of fundamental propositions that could gain approval during the third period, with postconciliar commissions handling implementation of these measures. Source: Internet
They conclude, on the basis of their rejection of the revised Mass rite and of postconciliar Church teaching as false, that the popes involved are false also. Source: Internet