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, 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

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

Her dad Charlie felt earlier detection could have given her a chance of walking, as he had seen "a big difference" since she had a one-off gene therapy infusion in Bristol.

From BBC ● Aug. 9, 2026

The gain was driven in part by Opdivo Qvantig, a cancer treatment that works similarly to Opdivo, but can be administered faster and not at an infusion center.

From The Wall Street Journal ● Jul. 30, 2026

That shift would help rural patients gain access to advanced treatments through mail-order pharmacies, rather than traveling hours to the nearest infusion center.

From The Wall Street Journal ● Jul. 22, 2026

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

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

Because they drained their savings buying and fixing up the house, they needed the cash infusions to fund the flora.

From Los Angeles Times ● Aug. 3, 2026

In earlier interviews with Barron’s, CEO Alan Baratz has warned of so-called lumpiness in the results resulting from irregular infusions of revenue.

From Barron's ● May 12, 2026

Antinausea medicines without which my body would refuse the monthly infusions.

From The Wall Street Journal ● May 4, 2026

During complex cancer treatments — such as chemotherapy infusions or imaging — patients may spend several hours in hospital.

From MarketWatch ● May 1, 2026

Letters and phone calls from him indicated that he was doing well on the practice field, but needed frequent cash infusions to keep his wardrobe up to college standards.

From "October Sky" by Homer Hickam