1N-COUNT 脚注 A footnote is a note at the bottom of a page in a book which provides more detailed information about something that is mentioned on that page. 脚注
2N-COUNT 补充;补充的信息 If you refer to what you are saying as a footnote, you mean that you are adding some information that is related to what has just been mentioned. 补充;补充的信息
As a footnote, I should add that there was one point on which his bravado was more than justified.
我补充一句,他有时表现得过分逞强。
3N-COUNT 无关紧要的事;次要事件 If you describe an event as a footnote, you mean that it is fairly unimportant although it will probably be remembered. 无关紧要的事;次要事件
I'm afraid that his name will now become a footnote in history.