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

Consider a rheumatoid arthritis patient who receives regular infusions of Remicade — one of the five affected drugs — to keep their inflammation under control. —Samuel Ganz, Sun Sentinel, 17 Aug. 2025

Unsecured Data Exhaust From Medical IoT Devices A critical but under-discussed vulnerability in healthcare is the data exhaust from medical IoT devices like infusion pumps and smart monitors. —Expert Panel®, Forbes.com, 13 Aug. 2025

In 2022, a man with muscular dystrophy received a gene-therapy infusion and died after developing a severe immune reaction. —Dhruv Khullar, New Yorker, 11 Aug. 2025

Baxter sat in one of the facility’s new private infusion rooms, expressing her satisfaction that big changes are finally happening much closer to home, decreasing the likelihood of travel to La Jolla for routine appointments. —Paul Sisson, San Diego Union-Tribune, 4 Aug. 2025

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