infusion

American  

[in-fyoo-zhuhn] / ɪnˈfyu ʒən /

noun

1. the act or process of infusing.

2. something that is infused.

3. a liquid extract, as tea, prepared by steeping or soaking.

4. Pharmacology.

   1. the steeping or soaking of a crude drug in water.

   2. the liquid so prepared.

5. Medicine/Medical.

   1. the introduction of a saline or other solution into a vein.

   2. the solution used.

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infusion British  

/ ɪnˈfjuːʒən, ɪnˈfjuːsɪv /

noun

1. the act of infusing

2. something infused

3. an extract obtained by soaking

4. med introduction of a liquid, such as a saline solution, into a vein or the subcutaneous tissues of the body

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Other Word Forms

• infusive
  adjective
• reinfusion
  noun

Etymology

Origin of infusion

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

Explanation

The most common example of an infusion you are likely to encounter in your daily life is your morning cup of coffee. An infusion is the creation of a new substance by steeping another substance in a liquid, usually water. Infusion is often misused with transfusion, which has a slightly different meaning. A transfusion, as in a blood transfusion, is the simple addition of one substance to another, without the creation of something new. But a drip feed of medicine, for example, is technically an infusion as it alters the state of the blood. See, you’re halfway to becoming a doctor (or at least a linguist) simply by reading this site.

Example Sentences

The infusion of wealth has sent tax revenue soaring.

From The Wall Street Journal • May 15, 2026

Since 2015, NHS patients have received the world's best-selling drug through a drip – or intravenous infusion – which can take more than an hour to administer in hospital.

From BBC • May 3, 2026

Following a strong start to the year, shares of the infusion therapy services provider fell by 24% yesterday after first quarter results External link underwhelmed.

From Barron's • May 1, 2026

The last U.S. host city, Salt Lake City, had a much smaller police department but benefited from an infusion of federal funding and mutual aid agreements with neighboring agencies.

From Los Angeles Times • May 1, 2026

As if the Gamemakers have sent an infusion of frozen air across the arena, which may be exactly what they've done.

From "The Hunger Games" by Suzanne Collins