# mildew

/ˈmɪɫˌdu/ (US) · /mˈɪldjuː/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/mildew
Updated: 2026-05-20

## Definition

a type of mold that grows on damp surfaces like walls, ceilings, or clothes. It usually looks like a white or gray powdery film.

For teachers: a type of mold that grows on damp surfaces, typically appearing as a white or gray powdery coating.

## Examples

- Mildew grows quickly in the damp bathroom.
- The landlord had to hire a professional to remove the mildew from the basement walls before the new tenants moved in.
- While mildew is generally less dangerous than its toxic counterparts, it can cause significant structural damage to wood and fabric if left untreated in a humid environment.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.