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

• edge in
• fit (in or into)
• insert
• insinuate
• intercalate
• interject
• interpolate
• interpose
• intersperse
• introduce
• sandwich (in or between)
• work in

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

The election has also injected uncertainty into the economy. —Jack Nicas, New York Times, 31 May 2025

The Trump administration’s ever-changing policies on tariffs and trade have injected chaos into the global energy economy. —Dan Gearino, Wired News, 31 May 2025

With other industries under pressure from tariffs, a U-turn from China on its unofficial K-pop ban could inject fresh momentum into South Korea’s entertainment industry. —Lee Ying Shan, CNBC, 30 May 2025

Whether by sidelining Iran in Syria, reshaping Lebanon, injecting himself into the United States via Iran nuclear diplomacy, or leveraging nuclear ambiguity, MBS is dictating the pace. —Clare Morell, MSNBC Newsweek, 30 May 2025

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