Fire"ball`(?), n. 1. (Mil.) A ball filled with powder or other combustibles, intended to be thrown among enemies, and to injure by explosion; also, to set fire to their works and light them up, so that movements may be seen.
2. A rare phenomenon often associated with or caused by lightning, resembling a luminous ball of fire passing rapidly through the air or along solid objects, then disappearing, and sometimes exploding. It seldom lasts more than a few seconds. Also called
globular lightning, or
[Webster 1913 Suppl. +PJC]
3. A large mass of fire caused by a large explosion, as of inflammable liquids or a nuclear device. The larger
fireballs, as of nuclear explosions, rise seemingly intact into the air and may reach high altitudes while still glowing.
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Thu 25th February 2021