[si-dey-shuh n]

noun Medicine/Medical.

the calming of mental excitement or abatement of physiological function, especially by the administration of a drug.
the state so induced.

Nearby words

  1. sedan,
  2. sedan chair,
  3. sedarim,
  4. sedate,
  5. sedately,
  6. sedative,
  7. seddon,
  8. sedecias,
  9. sedentary,
  10. seder

Origin of sedation

1535–45; < Latin sēdātiōn- (stem of sēdātiō), equivalent to sēdāt(us) (see sedate) + -iōn- -ion

Related formso·ver·se·da·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for oversedation



a state of calm or reduced nervous activity
the administration of a sedative
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 oversedation



early 15c., "alleviation of pain;" 1540s, "act of making calm," from Middle French sédation and directly from Latin sedationem (nominative sedatio) "a quieting, assuaging, a calming," noun of action from past participle stem of sedare (see sedate (adj.)).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for oversedation




Reduction of anxiety, stress, irritability, or excitement by administration of a sedative agent or drug.
The state or condition induced by a sedative.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.