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

Even Botox injections done by a professional—and with the proper drug—have their risks. —Simmone Shah, TIME, 22 Apr. 2024

All but one reported receiving the injections for cosmetic purposes. —Rachel Treisman, NPR, 19 Apr. 2024

What the new study found Lilly's study looked at two international groups of about 230 people, each of whom took the drug in injections of 10 to 15 mg for a year. —Karen Weintraub, USA TODAY, 17 Apr. 2024

The price of White’s beauty over the years could be best summed up in needles, injections, fillers, burning sensations and judgment. —Marissa Evans, Los Angeles Times, 16 Apr. 2024

These faulty injections, called extravasations, deposit radioactivity at the injection site rather than into the bloodstream as intended. —Pam Kohl and Bill Kiser, STAT, 12 Apr. 2024

The news conference celebrated another capital injection by a Japanese corporate giant into North Carolina as Prime Minister Fumio Kishida prepared to arrive in the state late Thursday. —Gary D. Robertson, Quartz, 11 Apr. 2024

One group was administered an additional daily injection of lixisenatide for 12 months, while the other group received a placebo. —Erin Clack, Peoplemag, 6 Apr. 2024

Miller, who survived a 2022 lethal injection attempt, filed a lawsuit this week to block the nitrogen execution, arguing the first execution under the new method caused cruel and prolonged suffering. —Corky Siemaszko, NBC News, 4 Apr. 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