n. A note of something to be remembered; a memorandum.n. A notice or an essay relating to something within the writer's own memory or knowledge; a record of facts upon a subject personally known or investigated; a concise account of one's knowledge or information on any topic; especially, a communication to a society containing such information: as, the Memoirs of the Academy of Sciences.n. plural A narrative of the facts or events of some phase of history or in the life of a person, written from personal knowledge or observation; a history or narrative dwelling chiefly upon points about which the writer is specially informed, as an autobiography or a continuous record of observations.n. In a restricted use, a biography; a memorial volume or work containing notices of the life and character of some one deceased, with extracts from his (or her) correspondence, etc.