re·mind·er 
/rɪˈmaɪndɚ/ noun
plural re·mind·ers /rɪˈmaɪndɚ/ noun [count] : something that causes you to remember or to think about something
▪ The accident was a sobering reminder of the dangers of climbing. ▪ a constant reminder of his past ▪ She sent him an e-mail reminder about the meeting. ▪ I wrote myself a reminder to take out the trash.
▪ The accident was a sobering reminder of the dangers of climbing. ▪ a constant reminder of his past ▪ She sent him an e-mail reminder about the meeting. ▪ I wrote myself a reminder to take out the trash.
