Look up Big Bang or big bang in Wiktionary, the free dictionary.
The Big Bang was, according to the prevailing cosmological theory of the universe's early development, the event that led to the formation of the universe.
Big Bang may also refer to:
Scienceedit
Big Bang nucleosynthesis, the production of certain hydrogen isotopes early in the universe's existence
Cold Big Bang, an alternative theory in which the start of the universe is at absolute zero
The Big Bang Fair, or The Big Bang UK Young Scientists and Engineers Fair, a celebration of science, technology, engineering and maths for young people
Operation Big Bang, "British Bang" or "Big Bang"; one of the largest conventional explosions in history