/ ɪnˈfjuːʒn; NAmE / noun [ C , U ]
1.
infusion of sth (into sth) ( formal ) the act of adding sth to sth else in order to make it stronger or more successful :
a cash infusion into the business
an infusion of new talent into science education
The company needs an infusion of new blood (= new employees with new ideas) .
2.
a drink or medicine made by leaving herbs , etc. in hot water
3.
[ C , U ] ( medical ) an act of slowly putting a drug or other substance into a person's vein ; the drug that is used in this way
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WORD ORIGIN
late Middle English (denoting the pouring in of a liquid): from Latin infusio(n-) , from the verb infundere , from in- into + fundere pour.