|  | 
Definition of Nerf ball
1. Noun. (''Trademark owned by Hasbro corporation'') Any small foam ball, soft and very light, designed for indoor use. ¹
¹ Source: wiktionary.com
|  | 
1. Noun. (''Trademark owned by Hasbro corporation'') Any small foam ball, soft and very light, designed for indoor use. ¹
¹ Source: wiktionary.com