Communion is read as union: with the sacred, and with everyone sharing the same table. Receiving it in a dream points to belonging and inner nourishment; being refused it, to feeling left outside.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.