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

As part of the deal, SIA injected S$360 million in cash into Air India and committed to contributing up to S$880 million in additional capital in the future. —Monica Pitrelli,lim Hui Jie, CNBC, 15 May 2026

Powell quickly convened his central bank colleagues for two rare emergency meetings in March 2020 to slash interest rates to near-zero and inject liquidity into the financial system through a lending program. —Bryan Mena, CNN Money, 15 May 2026

Edward Busby, whose intellect, IQ and the possible resulting disability were the focus of the argument in his appeals, died when pentobarbital was injected into his body. —Emerson Clarridge, Fort Worth Star-Telegram, 15 May 2026

When the deal was made two years ago, Apple needed to inject some cutting-edge AI into an aging Siri and OpenAI needed a Fortune 500-size flywheel to maintain its momentum as the leader of a new generation of AI startups. —Andrew Nusca, Fortune, 15 May 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