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

Prosecutors accused Gerhardt Konig of trying to kill his wife by attempting to inject her with a mysterious syringe and shove her off a cliff. —Thao Nguyen, USA Today, 9 Apr. 2026

As war injects extreme volatility into oil and gas markets, the global race for energy security is making China stronger, according to Jacky Tang, emerging markets chief investment officer at the private banking arm of Deutsche Bank AG. —Ishika Mookerjee, Fortune, 9 Apr. 2026

Amazon won’t be injecting anything into the streaming broadcast to highlight its e-commerce business, a person familiar with the matter told CNBC. —Alex Sherman, CNBC, 9 Apr. 2026

As Israel’s posture on Lebanon injected uncertainty into the situation Thursday, the Strait of Hormuz — which Iran agreed to reopen in the ceasefire deal — remained closed, according to Sultan Al Jaber, a government minister in the United Arab Emirates. —Nabih Bulos, Los Angeles Times, 9 Apr. 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