D-notice (plural D-notices)
- (Britain, now historical) A defence notice; an official request to news editors not to publish or broadcast items on specified subjects for reasons of national security (replaced in 1993 with the DA-notice).
- 1977, John Le Carré, The Honourable Schoolboy, Folio Society 2010, p. 18:
- His mistake was to select a heavy English Sunday paper which occasionally ran his pieces. The D-Notice forbidding all reference to these events was there ahead of him.