Definition of Big Bang in US English:

Big Bang

noun

Astronomy
  • The rapid expansion of matter from a state of extremely high density and temperature that according to current cosmological theories marked the origin of the universe.

    A fireball of radiation at extremely high temperature and density, but occupying a tiny volume, is believed to have formed around 13.7 billion years ago. This expanded and cooled, extremely fast at first, but more slowly as subatomic particles condensed into matter that later accumulated to form galaxies and stars. The galaxies are currently still retreating from one another. What was left of the original radiation continued to cool and has been detected as a uniform background of weak microwave radiation

    • ‘Science however, has the big bang growing due only to internal factors: matter and gravity.’
    • ‘The image contains stunning detail of the universe just after the big bang.’
    • ‘Some of the matter ejected by the big bang forms galaxies, like our very own milky way.’
    • ‘Gamma Ray Bursts are the most violent explosions the universe has seen since the big bang, astronomers say.’
    • ‘These bursts may be the universe's biggest explosions since the original big bang.’
    • ‘The big bang is the cosmic event that is theorized to have marked the origin of the universe.’
    • ‘What if all the dark matter during the first few minutes after the big bang had been dark ordinary matter?’
    • ‘In the initial stages of the big bang the universe existed in a highly compressed state.’
    • ‘This changes the whole view of the universe - big bang astronomy will never be the same.’
    • ‘The big bang singularity is where all the mass of the universe used to be concentrated.’
    • ‘From a massive explosion, the big bang, the universe started and has been expanding ever since.’
    • ‘Indeed, all of the matter in the universe was created in the first few moments after the big bang.’
    • ‘The big bang theory, evolution, plate tectonics, and other scientific marvels fascinated me.’
    • ‘Thus, the big bang was not an explosion in space; it was more like an explosion of space.’
    • ‘Globally the symmetry is broken in any universe that is finite, or began with a big bang.’
    • ‘They are the most violent events ever to have occurred in the universe, aside from the big bang itself.’
    • ‘Furthermore the big bang and the big crunch are actually the same event, just viewed from different directions.’
    • ‘The big bang should have produced equal quantities of matter and antimatter.’
    • ‘Cosmologists imagine the big bang theory by means of an analogy to an expanding balloon.’
    • ‘For the first third of a million years or so after the big bang, matter and energy in the universe moved in lockstep.’

Pronunciation

Big Bang

/bɪɡ ˈbæŋ//biɡ ˈbaNG/