• synonyms


or tran·quil·liz·er

See more synonyms for tranquilizer on Thesaurus.com
  1. a person or thing that tranquilizes.
  2. a drug that has a sedative or calming effect without inducing sleep.
  3. antianxiety drug.
  4. antipsychotic(def 2).
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Origin of tranquilizer

First recorded in 1790–1800; tranquilize + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for tranquillizer

medication, opiate, narcotic, dope, drug, hypnotic, analgesic, anodyne, depressant, downer, tranquillizer, barbiturate, pacifier, calmative

British Dictionary definitions for tranquillizer


tranquilliser or US tranquilizer

  1. a drug that calms a person without affecting clarity of consciousness
  2. anything that tranquillizes
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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 tranquillizer



"sedative," 1824 (first reference is to ground ivy), agent noun from tranquilize; in reference to one of a large group of anti-anxiety drugs, it is recorded by 1956.

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Online Etymology Dictionary, © 2010 Douglas Harper

tranquillizer in Medicine


(trăngkwə-līz′ər, trăn-)
  1. Any of various drugs used to reduce tension or anxiety; an antianxiety agent.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.