- to force or drive (a fluid) into some passage, cavity, or chamber; esp., to introduce or force (a liquid) into some part of the body by means of a syringe, hypodermic needle, etc.
- to fill by, or subject to, injection
- to introduce (a missing feature, quality, etc.): to inject a note of humor into a story
- to interject (a remark, opinion, etc.) as into a discussion
Origin of injectfrom Classical Latin injectus, past participle of injicere, to throw, cast, or put in from in-, in + jacere, to throw: see jet
transitive verbin·ject·ed, in·ject·ing, in·jects
- To force or drive (a fluid) into something: inject fuel into an engine cylinder; inject air into a liquid mixture.
- Medicine a. To introduce (a drug or vaccine, for example) into a body part, especially by means of a syringe.b. To treat by means of injection: injected the patient with digitalis.
- To introduce into conversation or consideration: tried to inject a note of humor into the negotiations.
- To place into circulation: inject money into the economy.
- To place into an orbit or trajectory: inject a satellite into geosynchronous orbit.
- Physics To cause (a beam of particles, for example) to strike a target.
Origin of injectLatin inicere iniect- to throw in in- in ; see in- 2. iacere to throw ; see yē- in Indo-European roots.
(third-person singular simple present injects, present participle injecting, simple past and past participle injected)
- To push or pump (something, especially fluids) into a cavity or passage.
- The nurse injected a painkilling drug into the veins of my forearm.
- To introduce (something) suddenly or violently.
- Punk injected a much-needed sense of urgency into the British music scene.
- To administer an injection to (someone or something), especially of medicine or drugs.
- Now lie back while we inject you with the anesthetic.
- to inject the blood vessels
- (intransitive) To take or be administered something by means of injection, especially medicine or drugs.
- It's been a week since I stopped injecting, and I'm still in withdrawal.
- (computing) To introduce (code) into an existing program or its memory space, often without tight integration and sometimes through a security vulnerability.
From the participle stem of Latin iniciō (“I throw in”), from in- + iaciō (“I throw”).