big bang theory
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Big Bang theory
A scientific theory describing the origin of all space, time, matter, and energy approximately 13.7 billion years ago from the violent expansion of a singular point of extremely high density and temperature.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
big′ bang′ the`ory
a theory that the universe began with an explosion of a dense mass of matter and is still expanding from the force of that explosion.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
big bang theory
The idea that the universe began with an explosion 13–20 billion years ago. According to the theory, formulated in 1927, the universe is still expanding. It is now obsolete to some extent. Compare steady state theory.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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|Noun||1.||big bang theory - (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|
scientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable"
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