Definition of "injection"
injection
/ɪn.ˈd͡ʒɛk.ʃən/
noun
countable and uncountable, plural injections
(medicine) Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
(internal combustion engines) Fuel injection: the pressurized introduction of fuel into a cylinder.