- WO is an abbreviation for a warrant officer, a person with specialized skills who is designated as an officer by a commissioned officer.
An example of a WO is a surgeon or chaplain in the United States Navy.
- Wo, often spelled woe, is defined as sorrow or grief.
An example of wo is how someone feels after hearing about a city hit by a tornado.
- warrant officer
Variant of who.
- Obsolete spelling of woe.
Variant of woe.