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See more synonyms for inject on Thesaurus.com
verb (used with object)
  1. to force (a fluid) into a passage, cavity, or tissue: to inject a medicine into the veins.
  2. to introduce (something new or different): to inject humor into a situation.
  3. to introduce arbitrarily or inappropriately; intrude.
  4. to interject (a remark, suggestion, etc.), as into conversation.
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Origin of inject

1590–1600; < Latin injectus past participle of in(j)icere to throw in, equivalent to in- in-2 + -jec- (combining form of jac- throw) + -tus past participle suffix
Related formsre·in·ject, verb (used with object)un·in·ject·ed, adjective


  1. (in prescriptions) an injection.
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Origin of inject.

From the Latin word injectiō
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for inject

Contemporary Examples

Historical Examples

  • But Bothwell had managed to inject a fly into the ointment of my content.

    The Pirate of Panama

    William MacLeod Raine

  • I will now inject a little of the blood serum of the victims into a white mouse.

    The Silent Bullet

    Arthur B. Reeve

  • That way you can find a chance to inject the stimulant when they are not looking.

  • If you want to get alcohol into my system you must inject it under my skin.

    The Blue Germ

    Martin Swayne

  • I merely wish to inject an idea into your brain, and leave it there to fructify.

    My Doggie and I

    R.M. Ballantyne

British Dictionary definitions for inject


verb (tr)
  1. med to introduce (a fluid) into (the body of a person or animal) by means of a syringe or similar instrument
  2. (foll by into) to introduce (a new aspect or element)to inject humour into a scene
  3. to interject (a comment, idea, etc)
  4. to place (a rocket, satellite, etc) in orbit
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Derived Formsinjectable, adjective

Word Origin

C17: from Latin injicere to throw in, from jacere to throw
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 inject


c.1600, from Latin iniectus "a casting on, throwing over," past participle of inicere "to throw in or on," from in- "in" (see in- (2)) + -icere, comb. form of iacere "to throw" (see jet (v.)). Related: Injectable; injected; injecting.

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Online Etymology Dictionary, © 2010 Douglas Harper

inject in Medicine


  1. To introduce a substance, such as a drug or vaccine, into a body part.
  2. To treat by means of injection.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.