Excommunicate dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Versatile - Anonymous

Technically, to be excommunicated is to be denied access to the sacraments, so in dreams signifies being prevented from communicating with the divine n emotionally, to find ourselves excommunicated in dreams suggests being cut off from a source of comfort.
Source: Dream Meanings of Versatile Author: Versatile - Anonymous

Interpretation 2 — Versatile - Anonymous

Material aspects: As humans we have a strong need at times to belong to groups. When we dream of being excommunicated we must cope with feelings of rejection, and perhaps of disapproval.
Source: Dream Meanings of Versatile Author: Versatile - Anonymous