Complex sentence: The IAU has no official definition of "bolide", and generally considers the term synonymous with fireball, a brighter-than-usual meteor, however, the term generally applies to fireballs reaching an apparent magnitude − 14 or brighter.
Split into simpler sentences: The IAU has no official definition of "bolide", and generally considers the term synonymous with fireball, a brighter-than-usual meteor. However, the term generally applies to fireballs reaching an apparent magnitude − 14 or brighter.