say it: ree-MAHYN-dur
reminder is a noun meaning "a message that helps you remember something". It carries 3 recorded senses.
a message that helps you remember something
“he ignored his wife's reminders”
an experience that causes you to remember something
someone who gives a warning so that a mistake can be avoided
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for reminder come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.