Definitions

1. noun

a person or thing that causes or is responsible for something becoming or going bad, especially by gradual processes such as decay or erosion.

“The moulder of the city’s economy was the rise of new industries.”

2. verb

to cause or be responsible for something becoming or going bad, especially by gradual processes such as decay or erosion.

“The neglect of the building has mouldered its walls.”

3. noun

a fungus that grows in damp places and causes rotting, especially of wood.

“The old boat was infested with a type of mould that had been eating away its hull.”

4. verb

to grow or thrive in a place where moisture is high and air circulation is poor, typically resulting in rotting or decay.

“The damp cellar had started to mould and was uninhabitable.”