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

The institute expects to add 16 subspecialty providers, expand clinical trial opportunities and house outpatient therapy, rehabilitation and neuro infusion services, along with Baptist Health’s first academic lecture theater. — Miami Herald, 10 Oct. 2026

Narrowing the spread also weakens the incentive to steer patients toward costlier drugs and to acquire physician practices and infusion clinics — the very behaviors that have made care more expensive. — Casey B. Mulligan, STAT, 8 Oct. 2026

The infusion comes at a crucial point for Hinojosa's campaign. — Caroline Linton, CBS News, 8 Oct. 2026

Candidates are charged a lower advertising rate than outside groups, so the late infusion of super PAC cash has come at a steep price. — Steven Sloan, Los Angeles Times, 7 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