forbidden

1 of 2

adjective

for·​bid·​den fər-ˈbi-dᵊn 

fȯr-

1

: not permitted or allowed

2

: not conforming to the usual selection principles

—used of quantum phenomena

forbidden transition

forbidden radiation

forbidden spectral line

forbidden

2 of 2

past participle of forbid entry 1

Synonyms of forbidden

Adjective

• prohibited
• banned

Examples of forbidden in a Sentence

Adjective

trespassing is forbidden

Recent Examples on the Web

Adjective

As a forbidden attraction grows between the two men, tragedy unleashes supernatural forces upon their deeply religious community. — Andreas Wiseman, Deadline, 28 Sep. 2026

Their forbidden love leads the Jade Emperor to decree their separation on opposite sides of the Milky Way. — ABC News, 19 Aug. 2026

To control the dangerous unfettered use of magic, an oversight council established ground rules on what is considered forbidden magic and the knowledge of its existence. — Kalai Chik, Forbes.com, 7 Aug. 2026

Last November, both TMZ and CBS News reported alleged infractions, including being caught with homemade alcohol and trying to make a forbidden three-way phone call. — Cheyenne Roundtree, VIBE.com, 24 July 2026

Word History

First Known Use

Adjective

13th century, in the meaning defined at sense 1

Phrases Containing forbidden

• forbidden fruit
• forbidden rice