an official notice sent to newspapers, prohibiting the publication of certain security information
Word origin
C20: from their administrative classification letter
D-notice in American English
(ˈdiˌnoutɪs)
noun
Brit
a government notice sent to newspapers or other publications requesting them to withhold information for reasons of state security
Also: D notice
Word origin
[1960–65; D(efence) notice]This word is first recorded in the period 1960–65. Other words that entered Englishat around the same time include: Pap test, buyback, disco, parvovirus, tag question