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  1. calm, peaceful, or tranquil; unruffled: a serene landscape; serene old age.
  2. clear; fair: serene weather.
  3. (usually initial capital letter) most high or august (used as a royal epithet, usually preceded by his, your, etc.): His Serene Highness.
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  1. serenity; tranquillity.
  2. Archaic. a clear or tranquil expanse of sea or sky.
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Origin of serene

First recorded in 1495–1505, serene is from the Latin word serēnus (of the sky, weather) clear, unclouded
Related formsse·rene·ly, adverbse·rene·ness, nouno·ver·se·rene, adjectiveo·ver·se·rene·ly, adverbun·se·rene, adjectiveun·se·rene·ly, adverbun·se·rene·ness, noun


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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for serene


  1. peaceful or tranquil; calm
  2. clear or brighta serene sky
  3. (often capital) honoured: used as part of certain royal titlesHis Serene Highness
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Derived Formsserenely, adverbsereneness, noun

Word Origin

C16: from Latin serēnus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for serene


mid-15c., "clear, calm," from Latin serenus "peaceful, calm, clear" (of weather), figuratively "cheerful, glad, tranquil," of uncertain origin; perhaps from a suffixed variant of PIE *ksero- "dry," source of Greek xeros "dry" (see xerasia). In English, applied to persons since 1630s. Related: Serenely.

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Online Etymology Dictionary, © 2010 Douglas Harper