as silent as the grave
US /æz ˈsaɪlənt æz ðə ɡreɪv/
UK /æz ˈsaɪlənt æz ðə ɡreɪv/
1.
extremely quiet; completely silent
:
•
After the news, the room became as silent as the grave.
•
The children were told to be as silent as the grave during the ceremony.