[ si-dey-shuh n ]
/ sɪˈdeɪ ʃən /

noun Medicine/Medical.

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

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


/ (sɪˈdeɪʃən) /


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

Medicine definitions for oversedation


[ sĭ-dāshən ]


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.