making no sound; quiet; still

a silent motor.

refraining from speech.

speechless; mute.

not inclined to speak; taciturn; reticent.

characterized by absence of speech or sound

a silent prayer.

unspoken; tacit

a silent assent.

omitting mention of something, as in a narrative

The records are silent about this crime.

inactive or quiescent, as a volcano.

not sounded or pronounced

The b in doubt is a silent letter.

Movies . not having spoken dialogue or a soundtrack.

Medicine/Medical . producing no symptoms

silent gallstones.

Usually, silents. silent films.

adjective

clamorous , communicative , noisy , talkative , explicit , tangible

adjective

bashful , buttoned up , checked , clammed up , close , closed up , closemouthed , curbed , dumb , dummied up , faint , hush , hushed , iced , inarticulate , incoherent , inconversable , indistinct , inhibited , laconic , mousy , mum , mute , muted , noiseless , nonvocal , not talkative , reserved , restrained , reticent , shy , silentious , soundless , still , struck dumb , taciturn , tongue-tied , unclear , uncommunicative , unheard , unsociable , unspeaking , voiceless , wordless , zipped , aphonic , implicit , indescribable , inexpressible , nameless , tacit , unexpressed , unpronounced , unspoken , unuttered , unvoiced , quiet , stilly , close-mouthed , incommunicable , incommunicative , tightlipped , uncommunicable , undeclared , unsaid , discreet , inactive , inaudible , quiescent , secretive , speechless , tranquil