What does mildewing mean?
Mildewing is the process of becoming affected by mildew, a fungal growth that appears on damp, poorly ventilated, or decaying surfaces. It can describe physical objects, such as walls, clothing, books, or food, developing spots, a musty smell, and a generally spoiled appearance. The word can also be used figuratively for something gradually becoming corrupt, neglected, or less effective, as when a reputation or institution is said to be mildewing. In British English, the related noun is more often spelled “mould,” while American English generally uses “mold.” Although “mildew” is the more familiar noun, “mildewing” is useful when emphasizing an ongoing change rather than merely identifying the fungal condition. It suggests slow deterioration caused by dampness, neglect, or lack of care.
verbTo become covered or affected by mildew, a fungal growth that forms on damp or decaying material. In figurative use, it means to become spoiled, corrupted, or diminished.
- To become covered or infected with mildew.
- To develop a musty, spotted, or deteriorated appearance because of dampness or fungal growth.
- To become spoiled, corrupted, or diminished in a figurative sense.
"The wallpaper began mildewing after the room remained damp for weeks."
"The old books were mildewing in the humid cupboard."
"His reputation was mildewing after years of neglect and poor decisions."
Mildew is a quiet reminder that dampness can turn even a familiar surface into something unfamiliar and unwelcome.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does mildewing come from?
The word belongs to a family of forms inherited from Old English, where the language already had a term for mildew. The modern verb developed alongside the established noun and is now especially associated with British usage. Its meaning has also been extended figuratively to describe gradual corruption or decay.
Related word forms
How mildewing is actually used
The verb is relatively uncommon in everyday use compared with the noun “mildew.” “Mould” is preferred in British English, while “mold” is preferred in American English. The figurative use suggests gradual decay or loss of quality.
Easily confused with mildewing
“Mildew” is the noun naming the fungal growth or the condition, while “mildewing” describes the process of becoming affected by it.
In American English, “mold” is the usual spelling for the fungal growth and its associated condition; in British English, “mould” is standard.