Definition of fireball
1 : a ball of fire; also : something resembling such a ball the primordial fireball associated with the beginning of the universe — Scientific American
2 : a brilliant meteor that may trail bright sparks
3 : the highly luminous cloud of vapor and dust created by a nuclear explosion
4 : a highly energetic person
Examples of fireball in a sentence
The house erupted into a fireball.
<what this club needs is a fireball who will bring some sorely needed energy and enthusiasm>
First Known Use of fireball
FIREBALL Defined for English Language Learners
Definition of fireball for English Language Learners
: a huge mass of fire
Seen and Heard
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