Mildew

/ˈmɪlˌdu/

Meaning & Definition

noun
a fungus that grows in the form of a thin, whitish coating, often causing decay or damage in damp or warm conditions.
She found mildew growing on the walls of the basement due to high humidity.
a condition or appearance of decay or deterioration caused by mildew.
The fabric developed a mildew smell after being stored in a damp closet.
verb
to become covered with or affected by mildew.
If you leave the bread out too long, it will mildew and become uneatable.
to cause to become covered with or affected by mildew.
The damp conditions in the house can mildew the wooden furniture.

Etymology

Middle English mildewe, from Old English myldew, of uncertain origin.

Common Phrases and Expressions

mildew on the walls
refers to fungal growth found on interior walls, often due to moisture.
mildew-resistant
describes products or materials designed to prevent mildew growth.

Related Words

fungus
A group of organisms that includes yeasts, molds, and mushrooms, many of which can cause decay.
mold
A type of fungus that grows in the form of multicellular filaments called hyphae.

Slang Meanings

When something becomes stale or old.
That song is so mildewy, it's been played out.