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sine die

[sahy-nee dahy-ee, sin-ey-dee-ey; Latin si-ne dee-e]
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adverb
  1. without fixing a day for future action or meeting: The assembly adjourned sine die.
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Origin of sine die

From the Latin word sine diē without (a fixed) day
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for sine die

sine die

adverb, adjective
  1. without a day fixedan adjournment sine die
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Word Origin

literally: without a day
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

Word Origin and History for sine die

"indefinitely," Latin, literally "without (fixed) day," from sine "without" (see sans) + ablative singular of dies "day" (see diurnal).

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Online Etymology Dictionary, © 2010 Douglas Harper