1. reminder
He's a good reminder of what I don't want to become
If a buyer does not pay a price, he is often served with a reminder.
I need to set a reminder on my mobile
a reminder of the dangers of drinking and driving
Should you have settled the account since this mail was written, please ignore our reminder.
This is a friendly reminder about an overdue invoice.
Friendly Reminder: Please keep in mind the closing time of the line you need to switch to, so as to avoid delays in your trip.
2. an object that you buy or keep to remind yourself of a special occasion or a place you have visited