infusion

American  

[in-fyoo-zhuhn] / ɪnˈfju ʒən /

noun

• infusions
  plural

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 /

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

Derived Forms

• reinfusion
  noun
• infusive
  adjective

Inflected Forms

Nouns

• infusions
  plural

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

See Examples For:

infusion infusions

A deal would value the infusion provider at more than $5 billion.

From Barron's ● Oct. 5, 2026

Following one infusion, the AlloESO-T cells increased in number by roughly 100-fold.

From Science Daily ● Sep. 11, 2026

For now, CAR-T treatment generally comes only after other treatments have failed, in part because of potential side effects such as inflammation caused by the infusion.

From The Wall Street Journal ● Sep. 7, 2026

With the infusion of talent from the draft and the trade deadline, analyst ratings for the Angels’ minor league system have risen from among the worst in baseball to middle of the pack.

From Los Angeles Times ● Aug. 31, 2026

It was then Mayor Peters somehow received an infusion of courage to use the power he had been assiduously neglecting.

From "1919 The Year That Changed America" by Martin W. Sandler

She also told investors she was sending inventory to retailers such as Target and Walmart, and was receiving large infusions of money from companies such as Apple Inc. and Roc Nation.

From Los Angeles Times ● Sep. 27, 2026

There are coffee drinks, mocktails, optional infusions, DJs on the weekends and a back patio where friends gather to play cards, talk and linger.

From Salon ● Sep. 8, 2026

Here he gives a distinguished performance laced with surprising infusions of wit.

From The Wall Street Journal ● Jun. 1, 2026

The company’s foundry business remains unprofitable, but Intel is winning back confidence following capital infusions from industry partners and federal government support.

From Barron's ● May 7, 2026

“When you say remedies, do you mean your solutions, your infusions, or your suspensions?”

From "Hollow City" by Ransom Riggs