It means "no landing", "no hope" and "no news".
For example:
Many people draw lots, and the winning rate is low. Some people say "you are all silent", which means there is no hope of winning.
Xiao Li went shopping early in the morning and didn't know what to do. There was no sound at home. Xiao Li went shopping early in the morning. I don't know why, but there is no news at all.