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[muhl-ti-vurs] /ˈmʌl tɪˌvɜrs/
(in physics and cosmology) a hypothetical collection of identical or diverse universes, including our own.
See also parallel universe (defs 1, 2).
Origin of multiverse
First recorded in 1895-1900; multi- + (uni)verse Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for multiverse
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  • It is neither a universe pure and simple nor a multiverse pure and simple.

    Pragmatism William James
British Dictionary definitions for multiverse


(astronomy) the aggregate of all existing matter, of which the universe is but a tiny fragment
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for multiverse

1895, William James's coinage, an alternative to universe meant to convey absence of order and unity.

But those times are past; and we of the nineteenth century, with our evolutionary theories and our mechanical philosophies, already know nature too impartially and too well to worship unreservedly any god of whose character she can be an adequate expression. Truly all we know of good and beauty proceeds from nature, but none the less so all we know of evil. Visible nature is all plasticity and indifference, a moral multiverse, as one might call it, and not a moral universe. [William James, "Is Life Worth Living?" address to the Young Men's Christian Association of Harvard University, May 1895]

Online Etymology Dictionary, © 2010 Douglas Harper
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