NO SOUND[U]›when there is no sound: The three men ate in silence.No sound broke the silence of the wintry landscape.
NO TALKING[U]›when someone says nothing about a particular subject: She ended her silence yesterday and spoke to a TV reporter about the affair.
PERIOD OF TIME[C]›a period of time when there is no sound or no talking: an awkward/embarrassed silenceThere was a short silence while she thought about it.