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

Underwood, 44, is scheduled to be killed by lethal injection at the Oklahoma State Penitentiary in McAlester on December 19. —Jenna Sundel, Newsweek, 9 Dec. 2024

Xiao instructed the boy’s mother to stop giving him his injections, The Guardian reports, leading to Xiao being convicted of manslaughter in Sydney. —Cara Lynn Shultz, People.com, 6 Dec. 2024

The state allows prisoners to choose their preferred method of execution: lethal injection or gas chamber. —Annabella Rosciglione, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 6 Dec. 2024

Arizona previously used a mixture of drugs to carry out lethal injections but now only uses a compounded form of pentobarbital. —Jimmy Jenkins, The Arizona Republic, 5 Dec. 2024

Word History

First Known Use

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

Phrases Containing injection

• fuel injection
• hypodermic injection
• injection molding

Kids 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