n. The act of commemorating or calling to remembrance by some solemnity; the act of honoring the memory of some person or event by solemn celebration: as, the feast of the passover among the Israelites was an annual commemoration of their deliverance from Egypt.n. Eccles.: In the intercessory prayers of the eucharistic office, mention made by name, rank, or condition of persons living or departed, or of canonized saints; also, a prayer containing such mention: as, the commemoration of the living; the commemoration of the departed; the commemoration of the saints. See diptych.n. In the services for the canonical hours, a brief form, consisting of anthem, versicle, response, and collect, said in honor of God, of a saint, or of some biblical or ecclesiastical event: in the medieval church in England also called a memory, and sometimes a memorial. A complete service said in honor of a saint was also so styled.n. Parts of the proper service of a lesser festival inserted in the service for a greater festival when the latter coincides with and supersedes the former.