XO
English
Alternative forms
Adjective
XO (not comparable)
- Initialism of extra old; a grade of premium cognac, that has been aged in barrels for more than 6.5 years.
Derived terms
(extra old):
Coordinate terms
Noun
XO (plural XOs)
- (military, nautical) Initialism of executive officer.
Coordinate terms
- CO (commanding officer)
- 1O (first officer)
- 2O (second officer)
- 3O (third officer)
- 4O (fourth officer)