What is the meaning of the word "quiescent"?

Definitions:

  1. being quiet, still or inactive copy to clipboard adjective
    • The villagers were happy the nearby volcano was quiescent. copy to clipboard
  2. causing no pathological symptoms copy to clipboard adjective
    • The doctor was happy to inform me that my tumor was quiescent. copy to clipboard
  3. marked by a state of tranquil repose copy to clipboard adjective
    • The quiescent melancholy of the towns in rural New England is palpable. copy to clipboard