Definition of hush-hush in English:

hush-hush

Line breaks: hush-hush
Pronunciation: /hʌʃˈhʌʃ
 
/

adjective

informal
  • (Especially of an official plan or project) highly secret or confidential: a hush-hush research unit
    More example sentences
    • 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 top-secret project was so hush-hush they were barred from even taking photographs.
    • A lot of the game world is top secret and hush-hush.

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