1.common name for an edible agaric (contrasting with the inedible toadstool)
2.any of various fleshy fungi of the subdivision Basidiomycota consisting of a cap at the end of a stem arising from an underground mycelium
3.a large cloud of rubble and dust shaped like a mushroom and rising into the sky after an explosion (especially of a nuclear bomb)
4.fleshy body of any of numerous edible fungi
1.pick or gather mushrooms;
We went mushrooming in the Fall
2.grow and spread fast;
The problem mushroomed