What does detergent mean?
A detergent is a cleaning substance designed to remove dirt, grease, and stains from fabrics, dishes, surfaces, or even skin. Unlike simple soap, which is made from natural fats and oils, modern detergents are typically synthetic compounds known as surfactants; these molecules reduce the surface tension of water, allowing it to spread more easily and lift grime away from whatever is being cleaned. The word functions chiefly as a noun — as in laundry detergent or dishwasher detergent — though it also appears as an adjective meaning 'having cleansing power', a use common in scientific and medical writing. The term derives from the Latin verb tergēre, 'to wipe clean', the same root behind the word 'terse'. Because detergents work effectively even in hard water, they have largely replaced traditional soap in household products worldwide, making this a practical everyday word with a surprisingly classical pedigree.
A substance used to clean things, especially a synthetic product containing surfactants that lifts dirt and grease from fabrics, dishes, or surfaces.
"Add the detergent to the drum before loading your whites."
Having the power to cleanse or remove dirt; used especially in technical or medical contexts.
"The wound was rinsed with a detergent solution before dressing."
Usually uncountable when referring to the substance generally; the plural is used when distinguishing different types, brands, or formulations.
"The supermarket stocks a wide range of eco-friendly detergents."
The word 'detergent' comes from the Latin tergēre, 'to wipe off' — the same root that gives us 'terse', literally a style so clean it's been wiped smooth.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of detergent
Detergent comes from the Latin verb detergere, meaning 'to wipe off' or 'to cleanse thoroughly', formed from de- ('away') plus tergēre ('to wipe'). The same Latin root produced English words such as 'deterge' and, by a different route through Old French, 'terse'. The word entered English in the early 17th century as an adjective describing something with cleansing power, and its modern sense as a noun for synthetic cleaning agents became widespread only after such products were developed in the early 20th century.
Related word forms
How detergent is actually used
In everyday usage, 'detergent' most often refers to laundry or dishwasher products and is largely neutral in tone. As an adjective, its use is more technical, appearing mainly in scientific or medical contexts.
Easily confused with detergent
A disinfectant kills germs and bacteria, whereas a detergent removes dirt and grease without necessarily destroying microorganisms.