communion cloth, communion cup, communion table, etc noun

Those used at a service of Holy Communion

communion rail noun

The rail in front of the altar in some churches, at which the communicants kneel

Communion of Saints

The spiritual fellowship of all true Christian believers, the blessed dead and the faithful living, in Roman Catholic doctrine held to involve a mutual exchange of examples, prayers, merits and satisfactions

take communion

To receive the bread and wine at a service of Holy Communion