ETYM Latin silens, -entis, p. pr. of silere to be silent; akin to Goth. ana-silan.
1. Marked by absence of sound; SYN. soundless, still.
2. Having a frequency below or above the range of human audibility.
3. Not made to sound; SYN. unsounded.
4. (Of film) Having no spoken dialogue and usually no soundtrack.

A motion picture made without spoken dialogue — usually used in plural