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XO1

or XOXO

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  1. hugs and kisses.
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Origin of XO1

from X, symbol for a kiss; O, symbol for a hug

XO2

  1. executive office; executive officer.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for xo

XO

abbreviation for
  1. executive officer
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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