tran·​quil·​iz·​er | \ ˈtraŋ-kwə-ˌlī-zər How to pronounce tranquilizer (audio) , ˈtran-\
variants: or less commonly tranquillizer

Definition of tranquilizer

1 : a drug used to reduce mental disturbance (such as anxiety and tension) — compare antipsychotic
2 : one that tranquilizes

Examples of tranquilizer in a Sentence

a patient who is on tranquilizers

Recent Examples on the Web

Authorities in a California city had to use a tranquilizer dart to subdue a large pig that was menacing residents. San Diego Union-Tribune, "California authorities use tranquilizer to stop rogue pig," 25 Aug. 2019 Mercury News A 100-pound pig terrorized residents of a Riverside County neighborhood before being shot with a tranquilizer dart. Julia Wick, Los Angeles Times, "Newsletter: Film festivals, the L.A. County Fair and more in the week ahead," 26 Aug. 2019 Corona police and animal control personnel called for county assistance around 8:30 p.m. Authorities were able to corral the pig in a backyard, where it was shot with the tranquilizer. San Diego Union-Tribune, "California authorities use tranquilizer to stop rogue pig," 25 Aug. 2019 The synthetic opioid is most commonly used as a large-animal tranquilizer. Phil Davis,, "Drug dealer who called 911 after buyer fatally overdosed in home sentenced to 15 years in prison," 16 Aug. 2019 Using helicopters, tranquilizer darts, nets and refrigerated trucks, crews were able to remove 115 mountain goats from the park in September. USA TODAY, "Mermaid Parade, Lincoln’s Bible, District 12: News from around our 50 states," 24 June 2019 Coincidentally, the presence of S.H.I.E.L.D. is usually a mild tranquilizer for me. Darren Franich,, "Spider-Man: Far From Home," 24 June 2018 Female are shot with tranquilizers, captured, then either given a contraceptive vaccine or sterilized through surgical means. Laurel Chor, National Geographic, "Wild boars make a home amid Hong Kong’s high rises and highways," 2 Apr. 2019 Risks and abuses: Overdose can occur, but most such cases involve other drugs, particularly tranquilizers or alcohol. Felice J. Freyer,, "Medications to treat opioid addiction," 6 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tranquilizer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tranquilizer

1800, in the meaning defined at sense 2

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Statistics for tranquilizer

Last Updated

13 Sep 2019

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Time Traveler for tranquilizer

The first known use of tranquilizer was in 1800

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More Definitions for tranquilizer



English Language Learners Definition of tranquilizer

: a drug that causes a person or animal to become very relaxed and calm


tran·​quil·​iz·​er | \ ˈtraŋ-kwə-ˌlī-zər How to pronounce tranquilizer (audio) \

Kids Definition of tranquilizer

: a drug used to make someone calm and relaxed


variants: or chiefly British tranquillizer or tranquilliser \ -​ˌlī-​zər How to pronounce tranquilliser (audio) \

Medical Definition of tranquilizer

: a drug used to reduce mental disturbance (as anxiety and tension) — see antipsychotic

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Comments on tranquilizer

What made you want to look up tranquilizer? Please tell us where you read or heard it (including the quote, if possible).


to make a temporary encampment

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