hush-hush

[ huhsh-huhsh ]
/ ˈhʌʃˌhʌʃ /

adjective

highly secret or confidential: a hush-hush political investigation.

Origin of hush-hush

First recorded in 1915–20; reduplication based on hush
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for hush-hush

hush-hush

adjective

informal (esp of official work, documents, etc) secret; confidential
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012