injection
noun
in·jec·tion
| \ in-ˈjek-shən
\
\
Definition of injection
1a
: an act or instance of injecting
b
: the placing of an artificial satellite or a spacecraft into an orbit or on a trajectory
also
: the time or place at which injection occurs
2
: something (such as a medication) that is injected
3
: a mathematical function that is a one-to-one mapping — compare bijection, surjection
Examples of injection in a Sentence
The medicine cannot be taken orally; it must be given by injection.
an injection of a painkiller
The struggling company needed an injection of cash.
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Recent Examples on the Web
But much of that research relates to single events of pain that spike and come back down, like an injection or a blood draw. — Rachel Metz, CNN, "Breathe, focus, headset: The women turning to VR in labor," 8 Sep. 2019 Semma’s cells would be transplanted directly into the liver or meted out by an implant, freeing patients forever from their insulin injections. — BostonGlobe.com, "The week in business," 8 Sep. 2019 Sold in five trim levels in front- or 4Motion all-wheel drive, all models have a 268-horsepower, turbocharged and intercooled, direct-injection 2.0-liter four-cylinder engine with 258 foot-pounds of torque at 1,950 rpm. — Mark Maynard, San Diego Union-Tribune, "2019 VW Arteon: a cure for the common sedan," 6 Sep. 2019 That leads to budget-busting artificial insemination, embryo freezing, repeated injections and surgery. — Alicia Mundy, Washington Post, "The health-care system’s second-class citizens," 6 Sep. 2019 For younger women, injections can be used to treat areas with acne scarring or hollowness under the eyes. — Chloe Atkins, Vogue, "Preventative Botox in Your 20s Is Real—But It Could Be Aging You," 4 Sep. 2019 Among those initiative the lawsuit cited as being wrongly barred were ones to ban fracking and injection well usage in Medina and Portage counties. — Eric Heisig, cleveland.com, "Judge dismisses Secretary of State Frank LaRose from environmental activists’ lawsuit over access to elections ballots," 3 Sep. 2019 Doctors discovered low vitamin B12 levels and anemia, treating the patient with vitamin B12 injections and offering dietary advice. — Cnn.com Wire Service, The Mercury News, "Teen boy goes blind after existing on Pringles, white bread and French fries," 3 Sep. 2019 The doctor gave him vitamin B12 injections and advice on his diet. — David K. Li, NBC News, "Blinded by junk food: Teen loses eyesight from years-long bad diet, report says," 3 Sep. 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'injection.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for injection
injection
noun
English Language Learners Definition of injection
: the act or process of forcing a liquid medicine or drug into someone or something by using a special needle
: the act or process of forcing a liquid into something
: the addition of something (such as money) that is needed to support something
See the full definition for injection in the English Language Learners Dictionary
injection
noun
in·jec·tion
| \ in-ˈjek-shən
\
\
Kids Definition of injection
: an act or instance of forcing a fluid (as a medicine) into a part of the body by using a special needle
Insulin can be given by injection.
injection
noun
in·jec·tion
| \ in-ˈjek-shən
\
\
Medical Definition of injection
1a
: the act or an instance of injecting a drug or other substance into the body
b
: a solution (as of a drug) intended for injection (as by catheter or hypodermic syringe) either under or through the skin or into the tissues, a vein, or a body cavity
c
: an act or process of injecting vessels or tissues
also
: a specimen prepared by injection
2
: the state of being injected : congestion — see circumcorneal injection
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