Definition of fireball
- the primordial fireball associated with the beginning of the universe
- —Scientific American
The house erupted into a fireball.
what this club needs is a fireball who will bring some sorely needed energy and enthusiasm
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fireball.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: a huge mass of fire
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