1 a book in which you write down things that you have to do, remember, etc （记下要做的、不能忘的事等的）记事簿: I'll just check in my diary to see if I'm free that weekend. 我要查一查我的记事簿，看看那个周末有没有空。 ☞Look at the note at calendar. 参看calendar的注释。

2 a book in which you write down what happens to you each day 日记簿: Do you keep a diary ? 你有没有写日记的习惯？