Merriam-Webster's Collegiate® Dictionary, 11th Edition
MEMORIAL
I. adjective
Etymology: Middle English, from Latin memorialis, from memoria memory
Date: 14th century
serving to preserve remembrance ; commemorative , of or relating to memory, memorially adverb
II. noun
Date: 14th century
something that keeps remembrance alive: as, monument , something (as a speech or ceremony) that commemorates, keepsake , memento ,
2. record , memoir , memorandum , note , a statement of facts addressed to a government and often accompanied by a petition or remonstrance