WordWeb Online

1. Marked by absence of sound
   "a silent house"
   - soundless, still
    
2. Failing to speak or communicate etc when expected to
   "the witness remained silent"
   - mum
    
3. Implied by or inferred from actions or statements
   "gave silent consent"
   - tacit, understood
    
4. Not made to sound
   "the silent 'h' at the beginning of 'honour'"
   - unsounded
    
5. Having a frequency below or above the range of human audibility
   "a silent dog whistle"
    
6. Unable to speak because of hereditary deafness
   - dumb, mute

See also: implicit, inarticulate, inaudible, incommunicative, inexplicit, quiet, silence, silently, unarticulate, uncommunicative, unhearable

Encyclopedia: Silent