1.marked by absence of sound;
a silent house
2.failing to speak or communicate etc when expected to;
the witness remained silent
3.indicated by necessary connotation though not expressed directly;
gave silent consent
4.not made to sound;
the silent `h' at the beginning of `honor'
5.having a frequency below or above the range of human audibility;
a silent dog whistle
6.unable to speak because of hereditary deafness