If someone is jilted, the person they are having a romantic relationship with suddenly ends the relationship in a surprising and upsetting way. She was jilted by her first fiancé Driven to distraction, he murdered the woman who jilted him. One who discards a lover. to suddenly end a close romantic relationship with someone (jilt (17-20 centuries), probably from jillet (16-19 centuries), from the female name Jill)