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

What's New Kevin Underwood died by lethal injection in Oklahoma on Thursday in the nation's 25th and final execution of the year. —Benedict Cosgrove, Newsweek, 20 Dec. 2024

Oklahoma man Kevin Ray Underwood was put to death by lethal injection on Thursday in the nation’s 25th and final execution of the year. —Pilar Arias, Fox News, 19 Dec. 2024

Underwood was executed by lethal injection on his 45th birthday, according to Kay Thompson, a spokesperson for the Oklahoma Department of Corrections. —Amaris Encinas, USA TODAY, 19 Dec. 2024

The execution of Kevin Ray Underwood by lethal injection, which was conducted on his 45th birthday, came after the Oklahoma Pardon and Parole Board unanimously rejected his request for clemency last week in the death of his young neighbor, Jamie Rose Bolin. —Erik Ortiz, NBC News, 19 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