1. the state or quality of being covered with mould; the presence of mould or fungal growth
Usage: British spelling; American equivalent is 'moldiness'; uncountable noun

Examples

• The mouldiness in the bathroom was caused by poor ventilation and excess moisture.
• She noticed a strong smell of mouldiness coming from the basement.
• The old books showed signs of mouldiness after being stored in the damp attic.
• Regular cleaning helps prevent mouldiness in kitchens and bathrooms.
• The mouldiness on the bread made it unsafe to eat.
• He complained about the mouldiness of the apartment before moving in.