D defs.my
Entry 2 senses Webster, 1913

Stillness

/stĭl'-nəs/ · Still·ness · IPA /ˈstɪlnəs/
01 n. The quality or state of being still; quietness; silence; calmness; inactivity.
  1. 1.
    The quality or state of being still; quietness; silence; calmness; inactivity.
    “Painting, then, was the art demanded by the modern intellect upon its emergence from the stillness of the Middle Ages.” — J. A. Symonds.
  2. 2.
    Habitual silence or quiet; taciturnity.
    “The gravity and stillness of your youth The world hath noted.” Shak.