1. nephilim - Noun
3. Nephilim - Proper noun
Giants.
Source: Webster's dictionaryAccording to the apocryphal Book of Enoch the Nephilim were wicked sons of fallen angels who had lusted with attractive women. Source: Internet
Enoch is a very similar story to Genesis 6:4–5, and provides further description of the story connecting the Nephilim to the corruption of humans. Source: Internet