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English definition of “injection”

injection

noun [C or U] uk   /ɪnˈdʒek.ʃən/ us  

injection noun [C or U] (DRUG)

C2 the act of putting a liquid, especially a drug, into a person's body using a needle and a syringe (= small tube): Daily insulin injections are necessary for some diabetics. This steroid is sometimes given by injection.

injection noun [C or U] (SOMETHING NEW)

C2 the introduction of something new that is necessary or helpful to a situation or process: A cash injection of £20 million will be used to improve the health service. an injection of humour/excitement
(Definition of injection from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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