inject

verb

in·​ject in-ˈjekt How to pronounce inject (audio)
injected; injecting; injects
Synonyms of injectnext

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 How to pronounce inject (audio)
adjective or noun
injector
in-ˈjek-tər How to pronounce inject (audio)
noun

Synonyms of inject

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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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In their operating year ending in 2025, the companies were able to inject just a quarter of the CO2 collected there. — Katie Worth, ProPublica, 30 Oct. 2026 Consequently, the sustainability of the artificial intelligence investment boom has become a primary focal point for markets, injecting fresh uncertainty into the US growth outlook. — CNBC, 30 Oct. 2026 In that case, the robot is injected via a vitamin sized capsule and traverses the GI tract (including the small intestine) via a magnetic field. — Mack Degeurin, Popular Science, 29 Oct. 2026 So then, this rancher could inject anything with lard and butter, and people would be just as obsessed with it. — Payton Turkeltaub, Variety, 29 Oct. 2026 See All Example Sentences for inject

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

Time Traveler
The first known use of inject was in 1601

Rhymes for inject

See All Rhymes for inject

Browse Nearby Words

in its/their totality
inject
injectant
See all Nearby Words

Cite this Entry

“Inject.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inject. Accessed 1 Nov. 2026.

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Kids Definition

inject

verb
in·​ject in-ˈjekt How to pronounce inject (audio)
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 How to pronounce inject (audio)
adjective
injector
-ˈjek-tər How to pronounce inject (audio)
noun

Medical Definition

inject

transitive verb
in·​ject in-ˈjekt How to pronounce inject (audio)
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
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