a short note designating something to be remembered, esp. something to be done or acted upon in the future; reminder.

a record or written statement of something.

an informal message, esp. one sent between two or more employees of the same company, concerning company business

an interoffice memorandum.

Law . a writing, usually informal, containing the terms of a transaction.

Diplomacy . a summary of the state of an issue, the reasons for a decision agreed on, etc.

a document transferring title to goods but authorizing the return of the goods to the seller at the option of the buyer.