Meaning of forbidden fruit

forbid'den fruit'

Pronunciation: [key]
  1. the fruit of the tree of knowledge of good and evil, tasted by Adam and Eve against God's prohibition. Gen. 2:17; 3:3.
  2. any unlawful pleasure, esp. illicit sexual indulgence.
  3. pomelo (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.