Airsoft is a recreational activity in which participants launch spherical plastic projectiles at each other via spring, electric, or compressed-gas powered replica/toy firearms.
Airsoft is a sport in the same way that paintball is, however it is generally a little more diverse. Airsoft revolves around firing a projectile at an opponent in order to eliminate them from game-play in some fashion. Unlike paintball, where hits are clearly visible, airsoft bbs are non-marking. Due to this, airsoft is an honor sport in which players must acknowledge that they have been hit, even if no one else saw it happen.