Tranquillity is a sense of peace and quiet. It is the feeling you have while sitting under a starry sky, listening to the crickets. The aura of tranquility comes from the calm in the world, which makes you feel you are without a care in the world.

Tranquillity is also sometimes spelled with one l as tranquility. Its roots are in the Latin trans meaning "exceedingly" and quies meaning "rest" or "quiet." Tranquil means calm, and something that is exceedingly quiet or restful — a sunset or a rocking chair in the shade — can give you a sense of tranquillity or peacefulness.

Definitions of tranquillity
  1. noun
    an untroubled state; free from disturbances
    synonyms: quiet, tranquility
    see moresee less
    type of:
    established customary state (especially of society)
  2. noun
    a state of peace and quiet
    synonyms: quietness, quietude, tranquility
    see moresee less
    ataraxis, heartsease, peace, peace of mind, peacefulness, repose, serenity
    the absence of mental stress or anxiety
    easiness, relaxation
    a feeling of refreshing tranquility and an absence of tension or worry
    dreaminess, languor
    a relaxed comfortable feeling
    type of:
    a feeling of calm; an absence of agitation or excitement
  3. noun
    a disposition free from stress or emotion
    synonyms: placidity, quiet, repose, serenity, tranquility
    see moresee less
    peace of mind
    type of:
    calm, calmness, composure, equanimity
    steadiness of mind under stress
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week