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A cosmological model in which the early universe undergoes a period of exponentially rapid expansion, resulting in the high degree of homogeneity of matter observed in the present-day universe.
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.
(Astronomy) a variation of the cosmological big-bang theory in which the early stage of the evolution of the universe is postulated to include a period of accelerated expansion
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014