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serene

[suh-reen]
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adjective
  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.
noun
  1. serenity; tranquillity.
  2. Archaic. a clear or tranquil expanse of sea or sky.

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

Synonyms

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1. undisturbed, imperturbable, unperturbed, composed, collected. See peaceful. 2. unclouded.

Antonyms

1. disturbed. 2. clouded.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for serene

serene

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

adj.

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.

Online Etymology Dictionary, © 2010 Douglas Harper