reminder
/rɪˈmʌɪndə
/noun
1A thing that causes someone to remember something: her mushroom omelette is a blissful reminder of Sunday suppers...
- The walls remain, a purposeful reminder of the waste of war, and the roofless interior become a sort of peace park for contemplation.
- But those who had fought in it needed no reminders to remember.
- They probably served as visual reminders of wartime experiences - either as private memories or collective talking points for survivors.
Synonyms
prompt, prompting, cue, nudge;
aide-memoire, mnemonic
1.1A letter sent to remind someone of an obligation, especially to pay a bill: one man was threatened with court action for not paying his water rates when he did not receive a reminder