placidity Meaning, Definition & Usage

  1. noun a feeling of calmness; a quiet and undisturbed feeling
    placidness.
  2. noun a disposition free from stress or emotion
    tranquility; quiet; repose; serenity; tranquillity.

WordNet

Pla*cid"i*ty noun
Etymology
L. placiditas: cf. F. placidité.
Definitions
  1. The quality or state of being placid; calmness; serenity. Hawthorne.

Webster 1913