<p><strong>Noun:</strong></p><ul><li>a ball of snow pressed or rolled together, as for throwing.</li><li>any of several shrubs belonging to the genus <em>Viburnum</em>, of the honeysuckle family, having large clusters of white, sterile flowers.</li><li>a confection of crushed ice, usually in the shape of a ball, which is flavored with fruit or other syrup and served in a paper cup.</li><li>a scoop or ball of ice cream covered with shredded coconut and usually chocolate sauce.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>to throw snowballs at.</li><li>to cause to grow or become larger, greater, more intense, etc., at an accelerating rate: to snowball a small business into a great enterprise.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>to grow or become larger, greater, more intense, etc., at an accelerating rate.</li></ul>