D defs.my
Entry 1 sense Webster, 1913

Forbidden

/fôr'-bĭd-ən/ · For·bid·den · IPA /fɚ.ˈbɪ.dn̩/
01 a. Prohibited; interdicted.
  1. 1.
    Prohibited; interdicted.
    “I know no spells, use no forbidden arts.” Milton.
Phrases & compounds
Forbidden fruit — Any coveted unlawful pleasure, -- so called with reference to the forbidden fruit of the Garden of Eden.