big-bang theory
noun
a cosmological theory postulating that approximately 12 billion years ago all the matter of the universe, packed into a small superdense mass, was hurled in all directions by a cataclysmic explosion. As the fragments slowed down, the galaxies and stars evolved but the universe is still expanding
Compare steady-state theory
Words nearby big-bang theory
big top,
big tree,
big up,
big wheel,
big white chief,
big-bang theory,
big-boned,
big-box,
big-cone pine,
big-hearted,
big-league