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
This capital injection will allow HX to explore new destinations beyond its core polar regions, with upcoming itineraries including South America and the Galápagos.
—
David Nikel, Forbes, 21 Mar. 2025
In Oklahoma, 56-year-old Wendell Grissom was declared dead by lethal injection at the penitentiary in McAlester at 10:13 a.m.
—arkansasonline.com, 21 Mar. 2025
Hormone injections cause extreme emotional volatility.
—Liam Reilly, CNN, 20 Mar. 2025
Wendell Grissom, the death row inmate, received a lethal injection at the Oklahoma State Penitentiary in McAlester.
—CBS News, 20 Mar. 2025
See All Example Sentences for injection
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David Nikel, Forbes, 21 Mar. 2025
In Oklahoma, 56-year-old Wendell Grissom was declared dead by lethal injection at the penitentiary in McAlester at 10:13 a.m.
—arkansasonline.com, 21 Mar. 2025
Hormone injections cause extreme emotional volatility.
—Liam Reilly, CNN, 20 Mar. 2025
Wendell Grissom, the death row inmate, received a lethal injection at the Oklahoma State Penitentiary in McAlester.
—CBS News, 20 Mar. 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 1 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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