hush-hush adjective 1noun 1forms 2 adjective1 •Secret, not spoken of (or spoken of only in hushed whispers between insiders).The spy program was very hush-hush: no-one ever spoke of it. noun1 •secrecy; covert operationI find a very definite policy of hush-hush here about what Japan is doing […] — 1933 formsmore hush-hush · most hush-hush
