injection

noun

in·​jec·​tion in-ˈjek-shən How to pronounce injection (audio)
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

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In 2023, Idaho authorized the firing squad as a method of execution if lethal injection drugs were not available. William Lambers, Newsweek, 10 Mar. 2025 The day before his execution, Sigmon asked the South Carolina Supreme Court to pause his execution because the details of state’s lethal injection method are secret, to no avail, per the outlet. Bailey Richards, People.com, 8 Mar. 2025 Just a few hours before the death sentence, the U.S. Supreme Court denied an emergency motion to suspend the execution because of South Carolina's policies surrounding secretive lethal injection details. Alexandra Koch, Fox News, 7 Mar. 2025 The law allows inmates the option to instead choose firing squad or lethal injection, if available. Ryan Young, CNN, 7 Mar. 2025 See All Example Sentences for injection

Word History

First Known Use

15th century, in the meaning defined at sense 1a

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

Browse Nearby Words

Cite this Entry

“Injection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/injection. Accessed 14 Mar. 2025.

Kids Definition

injection

noun
in·​jec·​tion in-ˈjek-shən How to pronounce injection (audio)
1
: an act or instance of injecting
2
: something (as a medical drug) that is injected

Medical Definition

injection

noun
in·​jec·​tion in-ˈjek-shən How to pronounce injection (audio)
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
Last Updated: - Updated example sentences
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