in·jec·tion 
/ɪnˈʤɛkʃən/ noun
plural in·jec·tions /ɪnˈʤɛkʃən/ noun 1 : the act or process of forcing a liquid medicine or drug into someone or something by using a special needle [noncount] ▪ The medicine cannot be taken orally; it must be given/administered by injection. [count] ▪ Nurses give the injections. ▪ an injection of a painkiller 2 : the act or process of forcing a liquid into something [noncount] ▪ an engine with fuel injection [=a system that injects fuel directly into the cylinders of an engine] [count] ▪ injections of fuel 3 [count] : the addition of something (such as money) that is needed to support something
▪ The struggling company needed an injection of cash.
▪ The struggling company needed an injection of cash.
