A heavy silence/atmosphere noun phrase
Used to describe a situation when people say nothing and feel worried, embarrassed or uncomfortable
A heavy silence fell upon the room after Jane refused John's proposal.
Laura doesn't like this heavy atmosphere, so she decides to break it by singing a funny song.
My husband and I had a heavy silence on our first date, because we didn't know what to talk with each other.
A pause or silence which is full of meaning or sentiment
Not sound, or a spoken word from someone
Used to advise people that sometimes it is better to not say anything