reminder

Plural: reminders

Noun

• Something that serves to cause someone to remember.
• a message that helps you remember something
  • "he ignored his wife's reminders"
• an experience that causes you to remember something
• someone who gives a warning so that a mistake can be avoided
• Someone or something that reminds.
• Writing that reminds of open payments.

Examples

• He left a note as a reminder to get groceries.
• She ignored first the reminder of 80 cents. At the end, she was sentenced to pay 200 euros!
• The high-scoring REMINDER on the Words With Friends board was a reminder of my past victory.

Synonyms

admonisher, monitor