[ in-fyoo-zhuh n ]
/ ɪnˈfyu ʒən /


the act or process of infusing.
something that is infused.
a liquid extract, as tea, prepared by steeping or soaking.
  1. the steeping or soaking of a crude drug in water.
  2. the liquid so prepared.
  1. the introduction of a saline or other solution into a vein.
  2. the solution used.


Origin of infusion

1400–50; late Middle English < Latin infūsiōn- (stem of infūsiō). See infuse, -ion

Related forms

re·in·fu·sion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for infusion

British Dictionary definitions for infusion


/ (ɪnˈfjuːʒən) /


the act of infusing
something infused
an extract obtained by soaking
med introduction of a liquid, such as a saline solution, into a vein or the subcutaneous tissues of the body

Derived Forms

infusive (ɪnˈfjuːsɪv), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for infusion


[ ĭn-fyōōzhən ]


The process of steeping a substance in water to extract its soluble principles.
A medicinal preparation from such a process.
Introduction of a solution into the body through a vein for therapeutic purposes.
The solution introduced in such a manner.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.