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serein

American  
[suh-ran] / səˈræn /

noun

Meteorology.

  1. fine rain falling after sunset from a sky in which no clouds are visible.

serein British  
/ səˈreɪn /

noun

  1. fine rain falling from a clear sky after sunset, esp in the tropics

"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

Etymology

Origin of serein

1865–70; < French serein, Middle French serain evening, nightfall < Vulgar Latin *sērānum, equivalent to Latin sēr ( um ) a late hour (neuter of sērus late) + -ānum, neuter of -ānus -an; compare obsolete English serene < Middle French

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.