Definition of hush-hush in US English:

hush-hush

adjective

informal
  • (especially of an official plan or project) highly secret or confidential.

    ‘a hush-hush research unit’
    • ‘‘There was nothing written down, nothing traceable,’ one source close to the hush-hush negotiations explained last night.’
    • ‘The top-secret project was so hush-hush they were barred from even taking photographs.’
    • ‘Adoption is no longer a hush-hush affair and there are even those who are willing to consider it an alternative to biological parenthood.’
    • ‘Of course it was all kept hush-hush, because we did not want to tell the Germans they had had a success.’
    • ‘We have a great theme going, but I can't post it on the blog, cos everything has to be hush-hush till the last moment.’
    • ‘‘There are a few people who are interested, but it's all hush-hush,’ one said this week.’
    • ‘Yeah, I'm working on something, but right now I've got to keep it hush-hush.’
    • ‘It gives them a real lift and we had to keep it a bit hush-hush to stop the entire hospital coming down here.’
    • ‘We didn't know where we were going to, it was very hush-hush.’
    • ‘I put the photos away and I conduct a very hush-hush surveillance.’
    • ‘Now, these were supposed to be very hush-hush talks.’
    • ‘‘It's such a hush-hush situation that only involves family members most of the time, so victims don't feel they can get help,’ she said.’
    • ‘The subjects of hush-hush all-girls' conversations were now discussed in the open.’
    • ‘Negotiations are underway with the province about new powers for the city, but it is being kept so hush-hush, one can only assume another opportunity is being missed.’
    • ‘A lot of the game world is top secret and hush-hush.’
    • ‘Main is also working on a hush-hush project involving a Scottish-based online games business and a couple of high-profile sports journalists.’
    • ‘The hush-hush epic will be screened this autumn.’
    • ‘She lost 25 pounds, but was able somehow to keep her illness hush-hush from almost everyone, including her three sons.’
    • ‘The big name acts are pretty hush-hush at the moment, but the line-up is guaranteed to read like the who's who of Aussie music.’
    • ‘You may see a slight hush-hush raise in taxes and perhaps a slight improvement in some social services but probably not the ones you'll actually use.’
    confidential, strictly confidential, top secret, classified, restricted, unrevealed, undisclosed, unpublished, untold, unknown, uncommunicated, behind someone's back, under wraps, unofficial, off the record, not for circulation, not for publication, not to be made public, not to be disclosed
    secret, top secret, confidential, strictly confidential, classified, restricted, under wraps, off the record, not for circulation, not for publication, not to be made public, not to be disclosed
    View synonyms

Pronunciation

hush-hush

/ˈˌhəSH ˈˌhəSH//ˈˌhəʃ ˈˌhəʃ/