inject

verb

in·​ject in-ˈjekt 

injected; injecting; injects

transitive verb

1

a

: to introduce into something forcefully

inject fuel into an engine

b

: to force a fluid into (as for medical purposes)

inject a drug into the bloodstream

2

: to introduce as an element or factor in or into some situation or subject

… condemning any attempt to inject religious bigotry into the campaign.

—Current Biography

injectable

in-ˈjek-tə-bəl 

adjective or noun

injector

in-ˈjek-tər 

noun

Synonyms of inject

• insert
• introduce

Examples of inject in a Sentence

She told a few jokes to inject a little humor into her speech.

We need to inject some life into this party.

Recent Examples on the Web

Instead of trying to revive a rivalry in-house, the acquisition feels like the right opportunity to finally, fully put Showtime to bed and simply inject its programming into the HBO and HBO Max libraries. —Tony Maglio, HollywoodReporter, 27 Feb. 2026

As per Inpex, synthetic methane produced at the site was successfully injected into a natural gas pipeline on February 20. —Georgina Jedikovska, Interesting Engineering, 27 Feb. 2026

When the patient, complained of pain, infection and a hole in her chin, Magalhaes Pereira had her return and then injected her with a steroid, put her under a red light, and gave her a Brazilian antibiotic, according to the arrest report. —Cindy Krischer Goodman, Sun Sentinel, 26 Feb. 2026

For me, this collaboration was about merging utility with emotion — taking the functional codes we’re known for and injecting them with a sense of play, color and character. —Andrea Onate, Footwear News, 25 Feb. 2026

Word History

Etymology

Latin injectus, past participle of inicere, from in- + jacere to throw — more at jet

First Known Use

1601, in the meaning defined at sense 1a

Rhymes for inject

• affect
• aspect
• bedecked
• bisect
• collect
• connect
• correct
• deflect
• detect
• direct
• dissect
• effect

Kids Definition

inject

verb

in·​ject in-ˈjekt 

1

a

: to throw, drive, or force into something

inject fuel into an engine

b

: to force a fluid into (a part of the body) especially for medical reasons

2

: to introduce as an additional element

injected humor into her speech

injectable

-ˈjek-tə-bəl 

adjective

injector

-ˈjek-tər 

noun

Medical Definition

inject

transitive verb

in·​ject in-ˈjekt 

1

: to force a fluid into (a vessel, cavity, or tissue) for preserving, hardening, or coloring structures

2

: to introduce (as by injection or gravity flow) a fluid into (a living body) especially for the purpose of restoring fluid balance, treating nutritional deficiencies or disease, or relieving pain

also : to treat (an individual) with injections