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.

Recent Examples on the Web

Chang suggests treatment options that include silicone gel, steroid injections, and lasers. — Audrey Noble, Harper's BAZAAR, "How To Get Rid of Acne Scars—Forever," 21 Jan. 2019 In the years since the invention of the humble condom, women have been provided with a wide array of birth control options, from IUDs to implants, sponges, patches, injections, and so on. — Alexis Jones, Marie Claire, "This New Topical Gel Birth Control For Men Could Change Everything," 30 Nov. 2018 It will be designed to send 25 metric tons to trans-lunar injection and 70 metric tons to low-Earth orbit, SpaceNews reports. — Eric Berger, Ars Technica, "Rocket Report: SpaceX gets top clearance, Europe job cuts, Russian plans," 16 Nov. 2018 People with type 1 diabetes, a disease in which the pancreas does not make insulin (or makes very little), need to take insulin via injection or insulin pump, according to the Mayo Clinic. — Carolyn L. Todd, SELF, "Why a ‘Sugar Hangover’ Can Feel as Terrible as the Real Thing," 27 Oct. 2018 ImagineMD charges patients $149 a month, which includes visits and some services such as stitches, EKGs, joint injections and flu shots. — Lisa Schencker, chicagotribune.com, "More doctors embrace membership fees, shunning health insurance," 22 June 2018 The Angels will first see if the elbow responds to a platelet-rich plasma injection and stem-cell treatment. — Jeff Wilson, star-telegram, "Ohtani might need Tommy John surgery. Are Rangers breathing a sigh of relief?," 11 June 2018 Naloxone, often sold under the brand name Narcan, is administered by injection or nasal mist. — Catherine Ho, San Francisco Chronicle, "California orders opioid overdose antidote naloxone available without prescription," 8 June 2018 Patients who skip their injection and relapse are at high risk of overdose because their tolerance is low. — Felice J. Freyer, BostonGlobe.com, "Medications to treat opioid addiction," 6 June 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.

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Last Updated

6 Jun 2019

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Time Traveler for injection

The first known use of injection was in the 15th century

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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