To pour in or into, as a liquid; introduce and pervade with, as an ingredient: as, to infuse a flavor into sauce.To introduce as by pouring; cause to penetrate; insinuate; instil: with into: chiefly in figurative uses.To steep; extract the principles or qualities of, as a vegetable substance, by pouring a liquid upon it; make an infusion of.To affect or modify by infusion; mingle; hence, to imbue; tinge: followed by with.To pour, or pour out; shed; diffuse.n. An infusion.