What does infuser mean?
An infuser is most commonly a small basket, ball, or other container used to steep loose tea, herbs, flowers, spices, or fruit in water or another liquid. The porous or open design allows the liquid to absorb the ingredients’ flavour while keeping the solids out of the cup. It differs from a tea bag chiefly in construction and reuse: a tea infuser normally contains no paper or fabric sachet, allowing the user to control the quantity and sometimes remove the ingredients partway through steeping. The term can also describe a person or thing that introduces ideas, influences an environment, or permeates a substance, although this sense is formal and uncommon. In the culinary context, “tea infuser” is the most established collocation, while terms such as “herb infuser” and “fruit infuser” describe related uses. The word is useful when precision matters: “steep” describes the action, whereas “infuser” identifies the object that makes steeping possible.
A device or container used to steep tea, herbs, flowers, fruit, or other ingredients in liquid so that their flavour or essence is extracted.
"The steel infuser was filled with loose-leaf tea and placed in the hot water."
The culinary sense is the dominant modern usage. “Tea infuser” is especially common, although the device may also be used for herbs, spices, and fruit.
A person or thing that infuses, permeates, or instils something.
"The campaign was intended to act as an infuser of confidence among young voters."
This is a formal, literary, and comparatively uncommon extension of the word’s basic sense.
The regular plural is used when referring to multiple infusers, devices, or people with the abstract meaning.
"The shop sells infusers for tea, herbs, and whole spices."
A tea infuser turns a single leaf into an infusion: no disposable bag required, just loose tea and a little steeping time.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does infuser come from?
“Infuser” was formed in English by adding the agent-suffix “-er” to “infuse.” The base verb “infuse” comes through French from Latin infundere, meaning “to pour into.” The same Latin root underlies cognates and related formations such as “infundibulum” and “infusion.”
Related word forms
How infuser is actually used
In its common culinary sense, “infuser” is standard in both British and American English. The broader sense of a person who introduces ideas, influences others, or permeates a material is formal and much less common.
Easily confused with infuser
A tea infuser is a reusable or removable holder for loose ingredients, whereas a tea bag contains tea in a permeable paper or fabric sachet.
An infuser extracts flavour from ingredients placed in liquid, while a diffuser disperses a scent, sound, or light.