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

Since his appointment as creative director of Diesel in 2020, Martens has injected fresh energy and catapulted the brand back on the hype radar, relaunching the pop culture relevancy of the denim label founded by Renzo Rosso in 1978. — Sandra Salibian, Footwear News, 18 Sep. 2026

Abrams is fantastic as the bumbling protagonist, and Cregger injects a healthy dose of humor, gore, Easter eggs, and scares into the new adaptation. — Savannah Salazar, Vulture, 18 Sep. 2026

Guzman was also charged with possessing a device for using, injecting or ingesting drugs, according to the complaint. — Fedor Zarkhin, Los Angeles Times, 18 Sep. 2026

Widowed and nearing 60, Tony enjoys a quiet but contented routine, suddenly injected with anxiety when, during the school day, one of his young pupils innocently notes that his right hand looks frozen. — Guy Lodge, Variety, 17 Sep. 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