memorandum

1 a written communication giving information or directions <I'm waiting for the memorandum that will explain the new vacation policy> Synonyms directive, memo, notice Related Words announcement, bulletin, declaration, notification, posting, proclamation, pronouncement, release; dispatch, report; edict, pronunciamento, rescript; charge, command, dictate; directions, instructions, orders, word; encyclical, epistle, jotting, letter, mail, message, missive, note, post [chiefly British]

2 a message on paper from one person or group to another <the studio executives depend on endless memoranda to keep track of what's going on at a movie shot on location> Synonyms dispatch, epistle, memo, {h,1}letter, missive, noteRelated Words billet-doux, open letter; airmail, card, electronic mail, e-mail, junk mail, mail, postal card, postcard; communication, report; encyclical

3 a usually brief written reminder <dispatched a memorandum to her secretary about the assignment> Synonyms jotting, memo, note, notationRelated Words bordereau, memoir, memorial, minutes, protocol, report; line; document, writing