forbidden
/fəˈbɪd(ə)n
/adjective
1Not allowed; banned: a list of forbidden books...
- Whether it was the forbidden joy of being allowed to paint on a wall, or the exhilaration of letting their inhibitions go, their faces glowed with excitement.
- The guys nick some four-eyed geek's suitcase full of forbidden books - and this is where the title's Balzac reference comes in.
- The community is forced to shut down the library, because all the books contain the forbidden letter.
Synonyms
prohibited, banned, debarred, vetoed, proscribed, ruled out, not allowed, disallowed, taboo, impermissible, not acceptable, unauthorized, unsanctioned;
outlawed, illegal, unlawful, illicit, illegitimate, criminal;
North American interdicted;
German verboten;
Islam haram;
New Zealand tapu
informal no go, not on, out
rare non licet
2 Physics Denoting or involving a transition between two quantum-mechanical states that does not conform to some selection rule, especially for electric dipole radiation.Surprises emerged when the researchers looked at the crystal's effect on ultrasound frequencies above the forbidden range....
- Light within a forbidden range of wavelengths can't propagate through the array, so if a row of cylinders is omitted, the light will be trapped in the missing row.
Phrases
the forbidden degrees
forbidden fruit