injection
noun
in·jec·tion
in-ˈjek-shən 
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
The researchers noted that there were no major safety concerns, but 12% of participants reported mild reactions at the injection site.
—
Shiv Sudhakar, FOXNews.com, 12 Apr. 2025
Mahdi, 42, chose to die by three bullets to the heart instead of lethal injection or the electric chair.
—Arkansas Online, 12 Apr. 2025
The prisoner then receives an injection in their arm.
—Chris Gardner, HollywoodReporter, 11 Apr. 2025
Mikal Mahdi, 42, chose to be executed by a firing squad over lethal injection or the electric chair, according to the Associated Press.
—Lesley Cosme Torres, People.com, 11 Apr. 2025
See All Example Sentences for injection
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Shiv Sudhakar, FOXNews.com, 12 Apr. 2025
Mahdi, 42, chose to die by three bullets to the heart instead of lethal injection or the electric chair.
—Arkansas Online, 12 Apr. 2025
The prisoner then receives an injection in their arm.
—Chris Gardner, HollywoodReporter, 11 Apr. 2025
Mikal Mahdi, 42, chose to be executed by a firing squad over lethal injection or the electric chair, according to the Associated Press.
—Lesley Cosme Torres, People.com, 11 Apr. 2025
See All Example Sentences for injection
Cite this Entry
“Injection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/injection. Accessed 22 Apr. 2025.
Copy CitationKids Definition
injection
noun
in·jec·tion
in-ˈjek-shən
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
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
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