truth serum

noun
|Updated on: 15 Jun 2018

Definition of truth serum

: a hypnotic or anesthetic held to induce a subject under questioning to talk freely

Recent Examples of truth serum from the Web

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

First Known Use of truth serum

1913

in the meaning defined above

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Medical Dictionary

truth serum

noun

medical Definition of truth serum

: a hypnotic or anesthetic (as thiopental) held to induce a subject under questioning to talk freely

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