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 edifice may at first appear to have realized the modernist dream of injecting avant-garde art into everyday life, but its architects’ intention that the building serve only the glitterati of its day evacuated this modernist aesthetic of the socialist ideals typically underpinning it. —Michaëla De Lacaze Mohrmann, Artforum, 1 Jan. 2026

The organization added that Scotland is the worst European country for unqualified beauticians injecting customers with cosmetic treatments, reported BBC. —Skyler Caruso, PEOPLE, 31 Dec. 2025

Many AirSculpt patients opt to have fat that is removed from their stomachs or other places injected into their buttocks, often called a Brazilian butt lift. —Jason Kane, NBC news, 31 Dec. 2025

Since the storm, more than 445,000 visitors have traveled to the island, injecting $475 million into the economy, Tourism Minister Edmund Bartlett told the Miami Herald. —Jacqueline Charles, Miami Herald, 31 Dec. 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