big-bang theory

1. 1.

   (cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature

   Synonymsbig bang theory

   Broaderscientific theory

   cosmology

Questions about big-bang theory

What does big-bang theory mean?

big-bang theory means "(cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature".

What is another word for big-bang theory?

Close synonyms include big bang theory. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is big-bang theory a common word?

big-bang theory is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.