Reminder

n.

1.

One who, or that which, reminds; that which serves to awaken remembrance.

Noun	1.	reminder - a message that helps you remember something; "he ignored his wife's reminders"
	2.	reminder - an experience that causes you to remember something
	3.	reminder - someone who gives a warning so that a mistake can be avoided Synonyms: admonisher, monitor

admonition, adversaria, aide-memoire, annotation, cue, docket, entry, flapper, footnote, gesture, hint, indication, intimation, item, jogger, jotting, keepsake, marginal note, marginalia, memento, memo, memoir, memorandum, memorial, minutes, mnemonic, notation, note, notice, prompt, prompter, prompting, refresher, register, registry, relic, remembrance, remembrancer, scholia, scholium, sign, souvenir, suggestion, tickler, token, trophy, warming