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
Two were executed on the same day on June 10: Anthony Wainwright in Florida by lethal injection and Gregory Hunt in Alabama by nitrogen gas.
—
Amanda Lee Myers, USA Today, 14 June 2025
John Hanson, 61, received a three-drug lethal injection at the Oklahoma State Penitentiary in McAlester and was pronounced dead at 10:11 a.m., prison officials said.
—Democrat-Gazette Staff From Wire Reports, Arkansas Online, 13 June 2025
John Fitzgerald Hanson, 61, received a three-drug lethal injection at the Oklahoma State Penitentiary in McAlester and was pronounced dead at 10:11 a.m., prison officials said.
—Sean Murphy, Los Angeles Times, 12 June 2025
Snell threw 15 fastballs at around 70 percent intensity on Tuesday in his first bullpen session since receiving a pain-killing injection in his left shoulder last April.
—Fabian Ardaya, New York Times, 11 June 2025
See All Example Sentences for injection
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Amanda Lee Myers, USA Today, 14 June 2025
John Hanson, 61, received a three-drug lethal injection at the Oklahoma State Penitentiary in McAlester and was pronounced dead at 10:11 a.m., prison officials said.
—Democrat-Gazette Staff From Wire Reports, Arkansas Online, 13 June 2025
John Fitzgerald Hanson, 61, received a three-drug lethal injection at the Oklahoma State Penitentiary in McAlester and was pronounced dead at 10:11 a.m., prison officials said.
—Sean Murphy, Los Angeles Times, 12 June 2025
Snell threw 15 fastballs at around 70 percent intensity on Tuesday in his first bullpen session since receiving a pain-killing injection in his left shoulder last April.
—Fabian Ardaya, New York Times, 11 June 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 17 Jun. 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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