big bang

1. (cosmology) the cosmic explosion that is hypothesized to have marked the origin of the universe (synset 107423396)
   referred to in: cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe
   is a type of: blowup, detonation, explosion - a violent release of energy caused by a chemical or nuclear reaction

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