forbidden

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

Synonyms

• banned
• barred
• impermissible
• interdicted
• outlawed
• prohibited
• proscribed
• taboo
• tabu
• verboten

Examples of forbidden in a Sentence

trespassing is forbidden

Recent Examples on the Web

Thompson, Ha and Brownell also say that Season 4 will dive much more into the Regency era’s upstairs-downstairs class politics than previous seasons, due to Sophie being of a lower class than Benedict and the Bridgerton family, as well as the fairytale and forbidden love tropes. —Jennifer Maas, Variety, 14 Feb. 2025

The clever canine is captured standing frozen, waiting for the all clear, before attempting to climb onto a forbidden couch in a post to the platform by @maltimasi_ on January 30. —Thomas G. Moukawsher, Newsweek, 6 Feb. 2025

And while certain foods can increase blood sugars more quickly than others, there are no forbidden foods. —Carisa Brewster, Verywell Health, 14 Jan. 2025

Something else to consider is the part of the Internet that is the forbidden zone. —Lance Eliot, Forbes, 13 Jan. 2025

Word History

First Known Use

13th century, in the meaning defined at sense 1

Phrases Containing forbidden

• forbidden fruit