<p><strong>Noun</strong></p><ul><li>a ball of fire, as the sun; a shooting star.</li><li>a luminous meteor, sometimes exploding.</li><li>lightning having the appearance of a globe of fire; ball lightning.</li><li>the highly luminous central portion of a nuclear explosion.</li><li>a ball filled with explosive or combustible material, used as a projectile to injure the enemy by explosion or to set fire to their works.</li><li>Informal. an exceptionally energetic or ambitious person.</li></ul>