English Reference
noun

reminder

n.
US /ɹiˈmaɪndɝ/ UK /ɹɪmˈaɪndɐ/ re·minder UK spelling reminders

  1. 01 B1 Intermediate

    a message or note that helps you remember to do something.

    a communication or object intended to prompt the memory regarding a task or appointment.

    Simple

    I set a reminder on my phone so I wouldn't forget the doctor's appointment.

    In context

    The automated system sends a reminder to all participants twenty-four hours before the webinar begins to ensure maximum attendance.

  2. 02 B2 Upper Intermediate

    something that makes you think about a person, place, or event from the past.

    an object or circumstance that evokes a memory of a past event, person, or state of affairs.

    Simple

    The old photograph was a beautiful reminder of their summer holiday in Italy.

    In context

    The scarred landscape remains a somber reminder of the conflict that divided the region decades ago.

  3. 03 C1 Advanced Formal Finance

    a formal letter or message asking you to pay a bill that is late.

    a formal written notice requesting the settlement of an outstanding debt or overdue payment.

    Simple

    The company sent a final reminder because the electricity bill was two weeks late.

    In context

    Despite several reminders regarding the outstanding balance, the client failed to settle the invoice, forcing the firm to pursue legal action.

    Usage

    Often used with adjectives like 'first', 'second', or 'final' to indicate the level of urgency.

For Woongsa Kim, a look at his shares trading app is a painful reminder of what he had made then lost by investing in the South Korean stock market.

BBC News· 13 Aug 2026

It's a reminder of the risks that public criticism of the authorities and the war carry.

BBC News· 13 Aug 2026

From remind + -er.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Common
Updated