1. a fungus with a stem and cap, especially one that is edible
2. something that resembles a mushroom in shape

1. to grow or develop rapidly
2. to spread out like the cap of a mushroom

Examples

• We picked wild mushrooms in the forest.
• She added sliced mushrooms to the pizza.
• The atomic bomb created a mushroom cloud.
• The small startup mushroomed into a major corporation.
• Housing developments mushroomed in the suburbs.
• The smoke mushroomed above the building.