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To force or drive (a fluid) into something: inject fuel into an engine cylinder; inject air into a liquid mixture.
(verb-transitive)
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Medicine To introduce (a drug or vaccine, for example) into a body part, especially by means of a syringe.
(verb-transitive)
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To treat by means of injection: injected the patient with digitalis.
(verb-transitive)
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To introduce into conversation or consideration: tried to inject a note of humor into the negotiations.
(verb-transitive)
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To place into an orbit, trajectory, or stream.
(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.