truth serum

noun

Definition of truth serum

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

1913

First Known Use of truth serum

1913


Medical Dictionary

truth serum

noun

Medical Definition of truth serum

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

Learn More about truth serum


Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

an exhausted condition

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • peter-bruegel-tower-of-babel-painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!