[n] a refusal to speak when expected; "his silence about my contribution was surprising"
[n] the trait of keeping things secret
[n] the absence of sound; "he needed silence in order to sleep"; "the street was quiet"
[n] the state of being silent (as when no one is speaking); "there was a shocked silence"; "he gestured for silence"
[v] cause to be quiet or not talk; "Please silence the children in the church!"
[v] keep from expression, for example by threats or pressure; "All dissenters were silenced when the dictator assumed power"