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[in-jekt] /ɪnˈdʒɛkt/
verb (used with object)
to force (a fluid) into a passage, cavity, or tissue:
to inject a medicine into the veins.
to introduce (something new or different):
to inject humor into a situation.
to introduce arbitrarily or inappropriately; intrude.
to interject (a remark, suggestion, etc.), as into conversation.
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 forms
reinject, verb (used with object)
uninjected, adjective


(in prescriptions) an injection.
From the Latin word injectiō Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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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.

    Valley of the Croen Lee Tarbell
  • 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 (transitive)
(med) to introduce (a fluid) into (the body of a person or animal) by means of a syringe or similar instrument
(foll by into) to introduce (a new aspect or element): to inject humour into a scene
to interject (a comment, idea, etc)
to place (a rocket, satellite, etc) in orbit
Derived Forms
injectable, 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
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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.

Online Etymology Dictionary, © 2010 Douglas Harper
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inject in Medicine

inject in·ject (ĭn-jěkt')
v. in·ject·ed, in·ject·ing, in·jects

  1. To introduce a substance, such as a drug or vaccine, into a body part.

  2. To treat by means of injection.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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