reminder

A reminder helps you remember something. If you write "don't forget lunch" on your arm every morning, it means you need a reminder to grab your brown paper bag on your way out the door.

A reminder helps you remember, whether it's an appointment, an acquaintance's name, or a grocery list. You can give yourself a reminder, or write one to another person who's prone to forgetting details. The word's been around since the 1650s, and it came from remind, which originally meant "to remember." Later, remind came to mean "to make someone remember," or "to put someone in mind of something."

Definitions of reminder
1

n a message that helps you remember something

“he ignored his wife's reminders
Types:
phylactery, tefillin
(Judaism) either of two small leather cases containing texts from the Hebrew Scriptures (known collectively as tefillin); traditionally worn (on the forehead and the left arm) by Jewish men during morning prayer
Type of:
content, message, subject matter, substance
what a communication that is about something is about

n an experience that causes you to remember something

Types:
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hide 4 types...
deja vu
the experience of thinking that a new situation had occurred before
memento, souvenir
a reminder of past events
memento mori
a reminder (as a death's head) of your mortality
shades of
something that reminds you of someone or something
Type of:
experience
the content of direct observation or participation in an event

n someone who gives a warning so that a mistake can be avoided

Synonyms:
admonisher, monitor
Type of:
defender, guardian, protector, shielder
a person who cares for persons or property

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