Snowball \Snow"ball`\, n.

1. A round mass of snow pressed or roller together, or anything resembling such a mass.

2. (Bot.) The Guelder-rose.

Snowball tree (Bot.), the Guelder-rose.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Snowball \Snow"ball`\, v. t. [imp. & p. p. Snowballed; p. pr. & vb. n. Snowballing.]

To pelt with snowballs; to throw snowballs at.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Snowball \Snow"ball`\, v. i. To throw snowballs.

Source: Webster's Revised Unabridged Dictionary (1913)