Memorial is the name
(1) of a prayer of oblation; the prayer in the order of the communion beginning "O Lord and heavenly Father," which follows the communion of the faithful.
(2) The tomb of a martyr, or a church dedicated to his memory.
(3) The commemoration of a concurrent lesser festival by the use of its collect.
(4) Exequies, an office for the dead said by the priest in the 14th century in England.