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

The shift injects yet another element of volatility into the work of the federal division in charge of administering billions of dollars in taxpayer funds to states and schools to help students with disabilities. — Zachary Schermele, USA Today, 10 Sep. 2026

After spending much of the past decade injecting left-wing politics into its brand, Nike is now set to be removed from the S&P 100, ending a run of nearly 18 years in the blue-chip index. — Dan Zaksheske Outkick, FOXNews.com, 9 Sep. 2026

McBride’s work as an author and actor injects something refreshing into the discussion. — T. M. Brown, New Yorker, 8 Sep. 2026

The legal whiplash injected fresh confusion as both parties continue to wrangle over a mid-decade redistricting push and state election administrators scramble to prepare ballots for the November election. — Devin Dwyer, ABC News, 8 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