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English definition of “mushroom”

mushroom

noun [C]  /ˈmʌʃ·rum, -rʊm/ us  

mushroom noun [C] (PLANT)

any one of many types of fast-growing fungus (= plants without leaves or flowers) with a round top and short stem, many of which are used as food: wild mushrooms mushroom soup a pizza with mushrooms

mushroom

verb [I]  /ˈmʌʃ·rum, -rʊm/ us  

mushroom verb [I] (GROW)

to grow quickly: If your business were to mushroom, would you be happy?
(Definition of mushroom from the Cambridge Academic Content Dictionary © Cambridge University Press)
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