1. • noun - common name for an edible agaric (contrasting with the inedible toadstool)
   • noun - mushrooms and related fleshy fungi (including toadstools, puffballs, morels, coral fungi, etc.)
   • noun - any of various fleshy fungi of the subdivision Basidiomycota consisting of a cap at the end of a stem arising from an underground mycelium
   • noun - a large cloud of rubble and dust shaped like a mushroom and rising into the sky after an explosion (especially of a nuclear bomb)
   • noun - fleshy body of any of numerous edible fungi
   • verb - pick or gather mushrooms
   • verb - grow and spread fast
2. • Any of various fleshy fungi of the class Basidiomycota, characteristically having an umbrella-shaped cap borne on a stalk, especially any of the edible kinds, as those of the genus Agaricus.
   • Something shaped like one of these fungi.
   • To multiply, grow, or expand rapidly: The population mushroomed in the postwar decades.
   • To swell or spread out into a shape similar to a mushroom.
   • Relating to, consisting of, or containing mushrooms: mushroom sauce.
   • Resembling a mushroom in shape: a mushroom cloud.
   • Resembling mushrooms in rapidity of growth or evanescence: mushroom towns.
3. • v - to grow or spread rapidly

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