/ Dictionary / Index I infusion: Meaning and Definition of Find definitions for: in•fu•sion Pronunciation: (in-fy'zhun), [key] — n. the act or process of infusing. something that is infused. a liquid extract, as tea, prepared by steeping or soaking. the steeping or soaking of a crude drug in water. the liquid so prepared. the introduction of a saline or other solution into a vein. the solution used. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: infusion (Thesaurus) infusible infusionism Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language