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English definition of “mildew”

mildew

noun [U]     /ˈmɪl.djuː/ US  /-duː/
a black , green , or whitish area caused by a fungus that grows on things such as plants , paper , cloth , or buildings , usually if the conditions are warm and wet : There are patches of mildew on the walls .Bacteria, moulds, germs and viruses mildewed     /-djuːd/ US  /-duːd/ adjective mildewed rose bushes Bacteria, moulds, germs and viruses
(Definition of mildew noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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