n.
Pronunciation: ' m ə sh- ˌ rüm, - ˌ ru ̇ m; chiefly Northern & Midland - ˌ rün; dial ' m ə -sh ə - ˌ rüm, - ˌ ru ̇ m, - ˌ rün
Function: noun
Etymology: Middle English musheron, from Anglo-French musherum, musseron, from Late Latin mussirion-, mussirio
Date: 15th century
1 a : an enlarged complex aboveground fleshy fruiting body of a fungus (as a basidiomycete) that consists typically of a stem bearing a pileus especially : one that is edible b : FUNGUS
2 : UPSTART
3 : something resembling a mushroom