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.