memo an abbreviation for memorandum a short note written as a reminder;or a written record or communication,as in a business office a memorandum about the meeting 会议备忘 录 research memorandum 研究备忘 录 engineering memorandum 工程备忘 录 service memorandum 维修备忘memo an abbreviation for memorandum • a short note written as a reminder; or a written record or communication, as in a business office a memorandum about the meeting 会议备忘 录 research memorandum 研究备忘 录 engineering memorandum 工程备忘 录 service memorandum 维修备忘 录