say it: MUH-shroom
mushroom is a noun and verb meaning "common name for an edible agaric (contrasting with the inedible toadstool)". It carries 7 recorded senses.
mushrooms and related fleshy fungi (including toadstools, puffballs, morels, coral fungi, etc.)
any of various fleshy fungi of the subdivision Basidiomycota consisting of a cap at the end of a stem arising from an underground mycelium
a large cloud of rubble and dust shaped like a mushroom and rising into the sky after an explosion (especially of a nuclear bomb)
fleshy body of any of numerous edible fungi
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mushroom come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.