injection

noun in·jec·tion \ in-ˈjek-shən \

Updated on: 23 May 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

Viewers who see advertisements for Neulasta, a drug that reduces the risk of infections after chemotherapy, would learn that the list price for each injection is $6,200.

— robert pear, New York Times, "Requiring Prices in Drug Ads: Would It Do Any Good? Is It Even Legal?," 19 May 2018
Their cases are on hold while a federal judge in San Francisco considers challenges to the state’s untested procedures for single-drug lethal injections.

— bob egelko, San Francisco Chronicle, "Momentum grows to re-examine California case of convicted Death Row inmate," 18 May 2018
Some patients in clinical trials reported reactions to the drug at their injection sites.

— don reisinger, Fortune, "FDA Approves Drug Migraine Shot: What You Need to Know," 18 May 2018
The questions about the age of supplies come as several states have reported difficulties in obtaining drugs for lethal injections because of reluctance by manufacturers to provide them for that use.

— keri blakinger, Houston Chronicle, "Texas prisons taking heat over aging execution drugs experts say could cause 'torturous' deaths," 17 May 2018
Last week, New York City Mayor Bill de Blasio declared his intention to open four supervised consumption sites (also sometimes referred to as supervised injection sites or facilities) within the city limits.

— tessie castillo, SELF, "Here’s What Supervised Consumption Sites for Drug Users Actually Are," 9 May 2018
In subsequent months, the volunteers gathered in Springfield twice more for injections.

— amanda schaffer, WIRED, "The Dying Scientist and His Rogue Vaccine Trial," 1 May 2018
Over the last three years, the FDA inspectors found drug maker had produced batches of its vitamins and weight loss products for injection with potency and sterility failures.

— mike snider, USA TODAY, "Coastal Meds' sterile, injectable drug products recalled nationally as unclean, FDA orders," 18 Apr. 2018
There is currently a court order in place blocking Louisiana executions indefinitely while a lawsuit over the state's protocol for lethal injections unfolds.

— julia o'donoghue, NOLA.com, "Proposal to end death penalty rejected in Louisiana House committee," 11 Apr. 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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INJECTION Defined for English Language Learners

injection

Definition of injection for English Language Learners

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injection

Definition of injection for Students

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injection

medical Definition of injection

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