fire·​ball | \ ˈfī(-ə)r-ˌbȯl How to pronounce fireball (audio) \

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

Keep scrolling for more

Synonyms for fireball


Visit the Thesaurus for More 

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
Recent Examples on the Web But the expanding fireball also accelerated cosmic rays—mostly nuclei of hydrogen and helium—to close to the speed of light. Daniel Clery, Science | AAAS, 15 July 2021 Dashli Island’s fireball display is not typical of other mud volcanoes in the rest of the world and their daily routines. Shi En Kim, Smithsonian Magazine, 7 July 2021 After the initial fireball from the Big Bang faded into the CMB, but before the first stars started burning, there was a period when almost no light was being emitted in the universe. Chris Wright, Wired, 15 June 2021 For a few days, the city was a raging fireball of finance, technology and joyful anarchy, of unfathomable wealth and desperate striving. New York Times, 5 June 2021 The finale involves throwing fuel on the fire to create a giant fireball and boil-over. Chelsey Lewis, Milwaukee Journal Sentinel, 22 May 2021 At that instant a brilliant fireball meteor flashed across the constellation Hercules — intense blue-green, as bright as planet Venus, leaving a luminous trail. Peter M. Leschak, Star Tribune, 15 May 2021 Workers had been carrying out experiments with safety systems that led to a chain reaction of explosions which sent a fireball upwards and through the roof leading to a partial meltdown of the reactor. Amy Kellogg, Fox News, 27 Apr. 2021 This led to a hot gas leak, which led to an explosive fireball. Washington Post, 20 June 2021

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.

See More

First Known Use of fireball

15th century, in the meaning defined at sense 1

Keep scrolling for more

Learn More About fireball

Time Traveler for fireball

Time Traveler

The first known use of fireball was in the 15th century

See more words from the same century

Dictionary Entries Near fireball




See More Nearby Entries 

Statistics for fireball

Last Updated

21 Jul 2021

Cite this Entry

“Fireball.” Dictionary, Merriam-Webster, Accessed 3 Aug. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for fireball



English Language Learners Definition of fireball

: a huge mass of fire

More from Merriam-Webster on fireball

Nglish: Translation of fireball for Spanish Speakers Encyclopedia article about fireball


Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!