memorial

Etymology

From Late Latin memoriale, neuter of memorialis.

noun

1. (obsolete) Memory; recollection.
2. Something, such as a monument, by which someone or something is remembered.
3. A chronicle or memoir.
4. (now rare) A note or memorandum.
5. (chiefly Christianity) A service of remembrance or commemoration.
6. (law) A statement of facts set out in the form of a petition to a person in authority, a court or tribunal, a government, etc.
   Captain Surman […] immediately addressed a memorial to the governor, stating that an act of Providence had sent him into port for the preservation of the lives of those on board; he therefore trusted he should be allowed to refit and depart. 1808–10, William Hickey, Memoirs of a Georgian Rake, Folio Society 1995, page 178

adj

1. Serving as a remembrance of someone or something; commemorative.
   a memorial building
2. Contained in the memory.
   a memorial possession
3. (now rare) Mnemonic; assisting the memory.
   This succession of Aspirate, Soft, and Hard, may be expressed by the memorial word ASH. 1887, Walter William Skeat, Principles of English Etymology