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

Similar to cold caps that prevent hair loss during chemotherapy, nail cooling involves placing your hands and feet in bags or packs of ice before and during your infusion. — Maggie Ryan, Flow Space, 30 Oct. 2026

But fact-checkers and health analysts have been clear that this temporary infusion of funds, spread out over five years, doesn’t offset the $137 billion in permanent cuts projected to hit rural areas over the same decade. — Rachel Cohen Booth, Vox, 30 Oct. 2026

The formulation is also hydrating, thanks to an infusion of hyaluronic acid and glycerin. — Lauren Valenti, Vogue, 29 Oct. 2026

In addition to the £120 million infusion, the UK also plans to dole out £60 million to a sovereign AI fund to help boost domestic AI companies, and £18 million to boost homegrown chip design. — Ashley Gold, semafor.com, 28 Oct. 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