A note or outline to help one to remember; a brief record of something to be remembered.

备忘录。

In diplomacy, an informal outline or statement of the subject under discussion.

(外交)备忘录(指非正式文件)。

Statement of terms of sale with the privilege of return.

【商】买卖协议(保留取消买卖权的文书)。

Informal document stating the terms of a contract or transaction.

【法律】非正式的买卖契约书。

An informal message; esp. one sent between two or more employees of the same company.

【商】便笺；便函。