serene

/sə-ˈrēn/

Middle English, from Latin serenus clear, cloudless, untroubled

adjective

  1. marked by or suggestive of utter calm and unruffled repose or quietude

  2. clear and free of storms or unpleasant change

  3. shining bright and steady

a serene smile

calm tranquil serene placid peaceful mean quiet and free from disturbance. calm often implies a contrast with a foregoing or nearby state of agitation or violence. tranquil suggests a very deep quietude or composure.

noun

  1. a serene condition or expanse (as of sky, sea, or light)

  2. serenity, tranquility