A short note serving as a reminder. / A written business communication. / A brief diplomatic communication.

plural of memorandum

(rare) The writing of memoranda.

plural of memorandum of understanding

(law) A document that outlines the legal and factual premises believed by the parties to have been agreed to between them.

(law, US) A judicial opinion that does not create precedent.

A document that governs the relationship between a company and the outside world.

Alternative letter-case form of presidential memorandum

A legally-binding directive issued by the President of the United States, typically requiring one or more government agencies to carry out specified actions or to commence a regulatory process.

plural of memorandum opinion