What does defilement mean?
Defilement is the act or condition of making something unclean, impure, or corrupt — whether in a physical, ritual, or moral sense. At its most literal level it describes soiling or contamination, as when waste pollutes a river. More commonly today it carries a serious moral or spiritual charge: the desecration of sacred places, the tainting of what should remain pure, or, in legal contexts, the abuse of innocence. The word derives from "defile" (to make filthy), ultimately from Old English fūl, meaning foul, with reinforcement from Latin roots. It belongs to formal registers — law, religion, literature, and journalism — where its gravity is an asset. Because it evokes both dirt and violation, defilement is a powerful choice when ordinary words like "dirt" or "damage" feel too weak for the harm described.
The act or state of making something dirty, unclean, or impure.
"The defilement of the temple by vandals shocked the community."
The violation or corruption of something sacred, pure, or morally innocent.
"The novel explores the lasting damage caused by childhood defilement."
In legal contexts this sense frequently appears in statutes concerning sexual offences against minors.
Usually uncountable; the plural appears mainly when referring to multiple distinct acts or types of impurity.
"Ancient texts catalogue numerous defilements that render a worshipper ritually unfit."
"Defilement" and the narrow mountain pass called a "defile" share nothing but spelling — one comes from Latin filum, a thread of road, the other from filth itself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of defilement
Defilement comes from the verb "defile," which entered Middle English in the 15th century, blending two sources: the Old English-derived sense of "making foul" (from fūl, related to modern "filthy"), and the Old French defiler, from Late Latin dēfīlāre, literally "to thread off." The noun form developed alongside the verb to denote both physical pollution and ritual or moral impurity. It is thus cognate with "filth" and "filthy" on one side, and shares its French-Latin lineage with words like "profile" and "file," which preserve the "thread" sense.
Related word forms
How defilement is actually used
"Defilement" is a formal word carrying strong negative moral weight. In legal and journalistic contexts it often appears in discussions of sexual offences against children; in religious writing it refers to ritual impurity. It is rarely used in casual speech.
Easily confused with defilement
As a noun, "defile" can also mean a narrow mountain pass, a meaning entirely unrelated to "defilement," which always concerns making something unclean or violating its purity.