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in·ject / inˈjekt/ • v. [tr.] 1. drive or force (a liquid, esp. a drug or vaccine) into a person or animal's body with a syringe or similar device: the doctor injected a painkilling drug. ∎  administer a drug or medicine to (a person or animal) in this way: he injected himself with a drug overdose. ∎  [intr.] inject oneself with a narcotic drug, esp. habitually: people who want to stop injecting. ∎  introduce (something) into a passage, cavity, or solid material under pressure: inject the foam and allow it to expand. ∎  Physics introduce or feed (a current, beam of particles, etc.) into a substance or device. ∎  place (a spacecraft or other object) into an orbit or trajectory: many meteoroids are injected into hyperbolic orbits. 2. introduce (a new or different element) into something, esp. as a boost or interruption: she tried to inject scorn into her tone. ∎  (inject something with) imbue something with (a new element): he injected his voice with a confidence he didn't feel. DERIVATIVES: in·ject·a·ble adj. & n.

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