Any of the fleshy fruiting bodies of fungi typically produced above ground on soil or on their food sources (such as decaying wood).

A fungus producing such fruiting bodies.

Champignon or Agaricus bisporus, the mushroom species most commonly used in cooking.

Any of the mushroom-shaped pegs in bar billiards.

(architecture) A concrete column with a thickened portion at the top, used to support a slab.

(figurative) Something that grows very quickly or seems to appear suddenly.

Ellipsis of mushroom cloud.

(intransitive, figurative) To grow quickly to a large size.

To gather mushrooms.

To form the shape of a mushroom, particularly when a bullet strikes a soft target.

Having characteristics like those of a mushroom, for example in shape or appearance, speed of growth, or texture.