English

Definition of CO abbreviation from the Oxford Advanced Learner's Dictionary

 

CO

 abbreviation
abbreviation
BrE BrE//ˌsiː ˈəʊ//
 
; NAmE NAmE//ˌsiː ˈoʊ//
 
 
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Commanding Officer (an officer who commands a group of soldiers, sailors, etc.)
See the Oxford Advanced American Dictionary entry: CO