(GROWTH) UK and ANZ, US usually mold [noun] [U] - a soft green or grey growth which develops on old food or on objects that have been left for too long in warm wet airThere's mould all over this bread.When we stripped the wallpaper off the wall, we discovered mould growing underneath it.
MOULD
Meaning of MOULD in English
Cambridge English vocab. Кембриджский английский словарь. 2012