moldy

adjective

ˈmōl-dē 

moldier; moldiest

1

: of, resembling, or covered with mold

2

a

: being old and moldering : crumbling

b

: antiquated, fusty

moldy tradition

moldiness noun

Examples of moldy in a Sentence

Her books became moldy after being left in a damp basement.

The wine had a slightly moldy aroma.

Recent Examples on the Web

Reports of blood on the floor of a meat market; roach, fly and cricket infestations; and moldy ice machines and coolers sum up August’s health inspection reports for the metroplex. —Ella Gonzales, Fort Worth Star-Telegram, 8 Sep. 2025

If moisture isn’t properly removed, the result may be a moldy, mildewy couch. —Hallie Milstein, Southern Living, 8 Sep. 2025

One camp might have moldy walls and machinery stored inches from a sleeping area. —David Rodriguez Muñoz, Freep.com, 7 Sep. 2025

All the demonic activity in the house is hidden under poor Bill, whose only crime was letting his house get pretty moldy before the Hodgsons moved in. —Bethy Squires, Vulture, 5 Sep. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for moldy

• mouldy
• soldi

Kids Definition

moldy

adjective

ˈmōl-dē 

moldier; moldiest

: resembling, containing, or covered with mold

moldiness noun

Medical Definition

moldy

adjective

variants or chiefly British mouldy

ˈmōl-dē 

moldier or chiefly British mouldier; mouldiest

: covered with a mold-producing fungus

moldy bread