1. a ball of snow pressed or rolled together

1. to increase rapidly in size, intensity, or importance
2. to throw snowballs at someone or something

Examples

• The children made a snowball and threw it at the tree.
• She packed the snow tightly to form a perfect snowball.
• The small problem began to snowball into a major crisis.
• Costs snowballed as the project expanded.
• The kids were snowballing each other in the yard.
• What started as a minor disagreement snowballed into a heated argument.
• He rolled a huge snowball across the lawn.