1. a round white or brown fungus that releases spores in a cloud when pressed or broken
2. a round fluffy mass of something light

Examples

• The children found a large puffball mushroom in the woods.
• When kicked, the puffball released a cloud of brown spores.
• Giant puffballs can grow as large as basketballs.
• The dandelion seeds formed a white puffball ready to blow away.
• She picked the puffball carefully to avoid releasing the spores.
• The puffball fungus was perfectly round and smooth.