- XO is defined as hugs and kisses, or is the abbreviation for a military executive officer.
- An example of XO is what someone would put at the end of an email to a good friend, before signing their name.
- An example of XO is the individual on a Navy ship who is the primary assistant to the commanding officer and who is typically responsible for the administrative actions of the ship.
XO stands for hugs and kisses.
XO definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Mil. executive officer
xo - Computer Definition
The abbreviation for crystal oscillator. See crystal oscillator.