in ‧ fu ‧ sion /ɪnˈfjuːʒ ə n/ BrE AmE noun
1 . [uncountable and countable] the act of putting a new feeling or quality into something
infusion of
Further education badly needs the infusion of more resources.
2 . [uncountable and countable] medical the act of putting medicine slowly into someone’s body, or the medicine itself:
intravenous infusions of cardiac drugs
3 . [countable] a drink made with ↑ herb s in hot water that is usually taken as a medicine