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

Citing how some men’s brands have managed to add a more casual infusion without walking away from their more formal base, Lunelli pointed to Zegna and Loro Piana. —Rosemary Feitelberg, Footwear News, 17 Oct. 2025

Even with a new infusion of $15 billion of cap-and-trade funds, the California High-Speed Rail Authority barely has enough money to connect Bakersfield to Merced. —Marc Joffe, Oc Register, 16 Oct. 2025

Take, for instance, the purple welcome drink made of an infusion of rosemary, ayrampo seed, lemon juice, water, and sugar, which was so refreshing, our group asked for it nightly as an aperitivo. —Laura Dannen Redman, Robb Report, 16 Oct. 2025

Things shifted in Sheffield’s third term, when a number of newcomers joined the council and voted her president, and an infusion of federal pandemic relief funds made a broad range of initiatives possible. —Violet Ikonomova, Freep.com, 15 Oct. 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