infusion

noun

in·​fu·​sion in-ˈfyü-zhən 

1

: the act or process of infusing

an infusion of new ideas

2

: a product obtained by infusing

herbal infusions

3

: the continuous slow introduction of a solution especially into a vein

Examples of infusion in a Sentence

Her ideas have brought a new infusion of vitality to the organization.

a strong infusion of tea

a medicinal drink made by infusion of herbs

Recent Examples on the Web

Felchi said the infusion takes just 20 to 30 minutes. —Kerry Breen, CBS News, 7 Mar. 2026

That’s likely why his movie is more daring in its humor and tone, bringing a refreshing infusion of mischief to Pixar while maintaining the genuine emotional gravitas that has endeared the company to audiences for over 30 years. —Carlos Aguilar, Los Angeles Times, 6 Mar. 2026

In Nature Medicine, a team of German physicians had reported that five patients with severe lupus had received a one-time infusion of CAR-T cells, a therapy previously reserved for certain blood cancers. —Jason Liebowitz, New Yorker, 6 Mar. 2026

Some infusions can be dangerous for individuals with heart disease and kidney problems, whose bodies are not capable of processing the salts and fluids rapidly added to the body. —Cindy Krischer Goodman, Sun Sentinel, 5 Mar. 2026

Word History

Etymology

Middle English infusion, infusioun "act of pouring in (a medicine), injection, what is poured in, liquid extract," borrowed from Anglo-French & Latin; Anglo-French infusion "liquid extract," borrowed from Latin infūsiōn-, infūsiō "pouring in (of a medicament)," from infud-, variant stem of infundere "to pour in, instill" + -tiōn-, -tiō, suffix of action nouns — more at infuse

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for infusion

• allusion
• collusion
• conclusion
• confusion
• contusion
• delusion
• diffusion
• effusion
• exclusion
• extrusion
• illusion
• inclusion

Kids Definition

infusion

noun

in·​fu·​sion in-ˈfyü-zhən 

1

: the act or process of infusing

an infusion of new ideas

2

: a product obtained by infusing

a strong infusion of tea

Medical Definition

infusion

noun

in·​fusion in-ˈfyü-zhən 

1

a

: the introducing of a solution (as of glucose or salt) especially into a vein

also : the solution so used

b(1)

: the steeping or soaking usually in water of a substance (as a plant drug) in order to extract its soluble constituents or principles compare decoction sense 1

(2)

: the liquid extract obtained by this process

2

: a watery suspension of decaying organic material

culturing soil amebas in lettuce infusion