Definition from Wiktionary, the free dictionary
erastes (plural erastai)
- (historical) An adult man in Ancient Greece who courted or was in a pederastic relationship with an adolescent boy, who was called an eromenos.
- 2002, In regard to the boys (erōmenos) involved in ancient Greek pederasty, Dover (1978:52) asked: “What does the eromenos get out of submission to his erastēs?” — Stephen O Murray, Pacific Homosexualities (iUniverse 2002, p. 80)
the older partner in a pederastic relationship