during the early church: The sacrament associated with Lord's dinner.
later on, title for the portion of the eucharist sent to the unwell, or by bishops with other bishops and churches as a token of Christian love. These practices were very early stopped, because of the developing reverence for the elements.
Later still, the name given to the unconsecrated bread not needed in the eucharist, but blessed and distributed as a substitute for the eucharist among those members of the congregation who, though they had the right to take the communion, did not commune. This custom still exists in the Greek Church. Also called antidoron (which see). Also eulogy.