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[si-deyt] /sɪˈdeɪt/
calm, quiet, or composed; undisturbed by passion or excitement:
a sedate party; a sedate horse.
verb (used with object), sedated, sedating.
to put (a person) under sedation.
Origin of sedate
1640-50; < Latin sēdātus (past participle of sēdāre to allay, quieten); akin to sedēre to sit1
Related forms
sedately, adverb
sedateness, noun
unsedate, adjective
unsedately, adverb
unsedateness, noun
1. collected, serene, unruffled, unperturbed. See staid. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for sedate
Contemporary Examples
Historical Examples
  • On a fallen trunk by the water, sat a sedate group of water-bugs chewing young tendrils and nodding approval with their beards.

    Little Tom V. Tille
  • At times he was as mischievous as a boy, at times as sedate as a man.

    Dona Perfecta B. Perez Galdos
  • It would be interesting to know how the sedate people of Boston comported themselves on a festive occasion of that character.

    Captains of Industry James Parton
  • There were about thirty of them, all sedate men, the cream of the local merchants.

    Foma Gordyeff Maxim Gorky
  • At this moment Mr. de Warens, throwing open the door, announced Mr. Brown; that gentleman entered, with a sedate but cheerful air.

    The Disowned, Complete Edward Bulwer-Lytton
British Dictionary definitions for sedate


habitually calm and composed in manner; serene
staid, sober, or decorous
Derived Forms
sedately, adverb
sedateness, noun
Word Origin
C17: from Latin sēdāre to soothe; related to sedēre to sit


(transitive) to administer a sedative to
Word Origin
C20: back formation from 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
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Word Origin and History for sedate

"calm, quiet," 1660s, from Latin sedatus "composed, moderate, quiet, tranquil," past participle of sedare "to settle, calm," causative of sedere "to sit" (see sedentary). Related: Sedately.


"treat with sedatives," 1945, a back-formation from the noun derivative of sedative (adj.). The word also existed 17c. in a sense "make calm or quiet." Related: Sedated; sedating.

Online Etymology Dictionary, © 2010 Douglas Harper
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sedate in Medicine

sedate se·date (sĭ-dāt')
v. se·dat·ed, se·dat·ing, se·dates
To administer a sedative to; calm or relieve by means of a sedative drug.

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