injection

noun in·jec·tion \ in-ˈjek-shən \

|Updated on: 20 Jun 2018

Definition of injection

1 a : 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

See injection defined for English-language learners

See injection defined for kids

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.

Recent Examples of injection from the Web

As part of the procedure, she was given a 10-milligram shot of the local anesthetic lidocaine to numb the injection site, the same stuff your dentist uses before giving you what-for.

— david lazarus, latimes.com, "50,000% markup for a shot makes the case for a single-payer healthcare system," 15 June 2018
Instead, voters seem to care most about making a real dent in the misery on our streets and sidewalks — the tent camps, open-air injection drug use and ubiquitous heaps of garbage — and ensuring more people can afford housing in the city.

— heather knight, San Francisco Chronicle, "It’s a really big deal that SF elected London Breed as mayor," 13 June 2018
Montreal has opened several supervised injection sites in the last year.

— New York Times, "Opioid Crisis Compels New York to Look North for Answers," 21 May 2018
In the clinical studies, the most common adverse side effects were pain at the injection site and constipation.

— jacqueline howard, CNN, "FDA approves preventive migraine treatment," 18 May 2018
The procedure requires only two tiny injection sites, each only a few millimeters in length.

— brian sodoma, azcentral, "A better way to heal," 27 Apr. 2018
During inspections done in March and April 2018, the FDA found visible particles and poor sterile production practices for its products meant for injection use, the agency says.

— mike snider, USA TODAY, "Coastal Meds' sterile, injectable drug products recalled nationally as unclean, FDA orders," 18 Apr. 2018
Of those, 21 peopleindicated that injection drug use was one of their risk factors for infection, said Emily Gresham-Wherle,a spokeswoman for the health department.

— terry demio, Cincinnati.com, "No condoms at NKY needle exchanges, says Catholic health system St. Elizabeth," 27 Mar. 2018
Lawmakers have also reintroduced two bills that failed to pass last year that would authorize syringe exchange programs in areas at high risk for HIV and hepatitis C transmission from injection drug use.

— amy yurkanin, AL.com, "Opioids on the agenda for Alabama lawmakers," 26 Jan. 2018

These 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.

First Known Use of injection

15th century

in the meaning defined at sense 1a

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INJECTION Defined for English Language Learners

injection

noun

Definition of injection for English Language Learners

: 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

INJECTION Defined for Kids

injection

noun in·jec·tion \ in-ˈjek-shən \

Definition of injection for Students

: 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.

Medical Dictionary

injection

noun in·jec·tion \ in-ˈjek-shən \

medical Definition of injection

1 a : 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

Learn More about injection

See words that rhyme with injection Spanish Central: Translation of injection Nglish: Translation of injection for Spanish speakers Britannica English: Translation of injection for Arabic speakers Britannica.com: Encyclopedia article about injection

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injection

Definition of injection

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First Known Use of injection

INJECTION Defined for English Language Learners

injection

Definition of injection for English Language Learners

INJECTION Defined for Kids

injection

Definition of injection for Students

Medical Dictionary

injection

medical Definition of injection

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