reminder
n. countable C1 Advanced Oxford US //ɹiˈmaɪndɝ// UK //ɹɪmˈaɪndɐ// re·minder
n. something that helps you remember a task or a piece of information. It can be a note, a message, or even an object that makes you think of something else.
n. a thing that causes someone to remember something; a mnemonic or notification intended to prompt memory or action.
I set a reminder on my phone to call the bank.
The bank sent a friendly reminder because the monthly payment was three days overdue.
The sudden drop in stock prices served as a sobering reminder that market volatility can erase short-term gains in a matter of hours.
From remind + -er.
Usage
Often followed by 'to' plus an infinitive or 'that' plus a clause.