Valentine
Pronunciation : Val"en*tine
Part of Speech : n.
Definition : 1. A sweetheart chosen on St. Valentine's Day.
2. A letter containing professions of love, or a missive of a sentimental, comic, or burlesque character, sent on St. Valentine's Day. St. Valentine's Day, a day sacred to St. Valentine; the 14th of February. It was a very old notion, alluded to by Shakespeare, that on this day birds begin to mate. Hence, perhaps, arose the custom of sending love tokens at that time.
Source : Webster's Unabridged Dictionary, 1913