reminder
🇺🇸
/rɪˈmaɪndər/
🇬🇧
/rɪˈmaɪndə(r)/
something that helps you remember or think about someone or something
The alarm is a good reminder to take your medicine every morning.
闹钟是每天早上提醒你吃药的好方法。
a message that tells someone they forgot to do something
The library sends a reminder when your books are due back.
图书馆会在你的书籍到期时发送提醒。