- The definition of forbidden is something that is not allowed.
An example of something forbidden is opening a door that your parent has told you not to touch.
not permitted; prohibited
A past participle of forbid.
Having an extremely low probability of occurrence. Used of quantum phenomena: a forbidden transition.
(comparative more forbidden, superlative most forbidden)
- not allowed.
- past participle of forbid
From to forbid.
Variant of forbid