Synonyms of 'injection'
1 vaccinationDictionary, shot (informal) , jab (informal)
They gave me an injection to help me sleep.
2 introductionDictionary, investment, insertion
An injection of cash is needed to fund some of these projects.
related phobia trypanophobia
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If there is an infusion of one thing into another, the first thing is added to the other thing and makes it stronger or better.
He brought a tremendous infusion of hope to the people.
An inoculation against cholera is recommended.
Thesaurus for injection from the Collins English Thesaurus
If you have an injection , a doctor or nurse puts a medicine into your body using a device with a needle called a syringe .