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Noun fireball has 4 senses
bolide, fireball - an especially luminous meteor (sometimes exploding)--1 is a kind of meteor, shooting star
 
powerhouse, human dynamo, ball of fire, fireball - a highly energetic and indefatigable person--2 is a kind of actor, doer, worker
 --2 has particulars: self-starter
 
fireball - a ball of fire (such as the sun or a ball-shaped discharge of lightning)--3 is a kind of ball, globe, orb
 
 fireball - the luminous center of a nuclear explosion--4 is a kind of ball, globe, orb
 --4 is a part of nuclear explosion, atomic explosion
 
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