a brand name for a light plastic ball with holes in it

The game is played with a Wiffle ball, which moves rather slowly and not always in a straight line. 比赛用的是威浮球，其移动速度比较慢，而且不一定是直线移动。

a brand name of a game similar to baseball played in the US using a long, light plastic bat and a Wiffle ball

When we were kids we used to play Wiffle ball in the backyard. 我们小时候经常在后院玩威浮球。