Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

1

drug

play
noun \ˈdrəg\

Medical Definition of drug

  1. 1a:  a substance used as a medication or in the preparation of medicationbaccording to the Food, Drug, and Cosmetic Act :  a substance recognized in an official pharmacopoeia or formulary:  a substance intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease:  a substance other than food intended to affect the structure or function of the body:  a substance intended for use as a component of a medicine but not a device or a component, part, or accessory of a device

  2. 2:  something and often an illicit substance that causes addiction, habituation, or a marked change in consciousness




2

drug

verb

Medical Definition of drug

druggeddrug·ging

  1. transitive verb

  2. 1:  to affect with a drug; especially :  to stupefy by a narcotic drug

  3. 2:  to administer a drug to

  4. intransitive verb

  5. :  to take drugs for narcotic effect





Seen and Heard

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

WORD OF THE DAY

February 10, 2016

to put in good humor

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

pince-nez kittly-benders duvet spindrift
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ