say it: VAL-uhn-tahyn
valentine is a noun meaning "a sweetheart chosen to receive a greeting on Saint Valentine's Day". It carries 2 recorded senses.
a sweetheart chosen to receive a greeting on Saint Valentine's Day
“will you be my valentine?”
a card sent or given (as to a sweetheart) on Saint Valentine's Day
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 valentine 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.