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 medication — taken weekly by injection in the thigh, stomach or arm — is a brand name for semaglutide, which works in the brain to impact satiety.
—
Vanessa Etienne, People.com, 21 Jan. 2025
With Goff, who arrived in 2021 as a castoff from the Rams, Johnson and Lions head coach Dan Campbell were instrumental in providing an injection of belief and confidence.
—Dan Wiederer, Chicago Tribune, 21 Jan. 2025
Throughout Trump’s long history of cashing in on his personal brand, there has never been such a dramatic injection of artificial value.
—Will Gottsegen, The Atlantic, 20 Jan. 2025
According to the American Society of Plastic Surgeons, Botox injections have increased 28 percent since 2010 amongst 20 to 29-year-olds.
—Lauren Valenti, Vogue, 15 Jan. 2025
See all Example Sentences for injection 
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Vanessa Etienne, People.com, 21 Jan. 2025
With Goff, who arrived in 2021 as a castoff from the Rams, Johnson and Lions head coach Dan Campbell were instrumental in providing an injection of belief and confidence.
—Dan Wiederer, Chicago Tribune, 21 Jan. 2025
Throughout Trump’s long history of cashing in on his personal brand, there has never been such a dramatic injection of artificial value.
—Will Gottsegen, The Atlantic, 20 Jan. 2025
According to the American Society of Plastic Surgeons, Botox injections have increased 28 percent since 2010 amongst 20 to 29-year-olds.
—Lauren Valenti, Vogue, 15 Jan. 2025
See all Example Sentences for injection
Dictionary Entries Near injection
Cite this Entry
“Injection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/injection. Accessed 24 Jan. 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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