Definition from Wiktionary, the free dictionary
Alternative forms 
From Ancient Greek παιδεραστία (love of boys), from παιδεραστής (pederast), from παῖς (genitive παιδός) (child, son, boy) + ἐραστής (lover), from ἐράσθαι (to lοve), from ἐράω (to love passionately, to long for).
- Erotic love, sexually expressed or chaste, between a man and an adolescent boy.
- (archaic) Anal intercourse in general, usually between a man and an adolescent boy.
Usage notes 
- Originally referred to formal practices mandated by Greek customs and laws. Often used in a modern sense for either lawful or transgressive inter-generational love relationships.
- Often used colloquially to describe relationships between adults and pre-pubescent children (see pedophilia).
- boy love (colloquial)
Related terms