(1) (Greek mythology) brother of Prometheus; despite Prometheus's warning against gifts from Zeus he accepted Pandora as his wife
WiktionaryText
Proper noun
Epimetheus
Son of Iapetus and Clymene, brother to Atlas, Menoetius and Prometheus, of whom he ignored warnings to beware of any gifts from Zeus. He accepted Pandora as his wife, thereby bringing sorrow to the world; father to Pyrrha.