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.

---

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

---

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

An infusion of new funds approved by Congress this year and a waiver of eligibility procedures have staved off a potential crisis that would have left 4,200 back on the street.

From Los Angeles Times • Jul. 9, 2026

This latest infusion brings Amazon’s total planned investment in India to $48 billion between 2026 and 2030.

From Barron's • Jun. 25, 2026

Armed with this infusion of activity across various disciplines, the couple is inspired to continue to shake their way out of the past.

From Los Angeles Times • Jun. 19, 2026

Currently, apitegromab is only available for use in clinical trials and must be given into a vein as an infusion.

From BBC • Jun. 8, 2026

An investigation of an arts infusion program on creative thinking, academic achievement, affective functioning, and arts appreciation of children at three grade levels.

From "Music and the Child" by Natalie Sarrazin