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

CO

abbreviation
 
/ˌsiː ˈəʊ/
 
/ˌsiː ˈəʊ/
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  1. Commanding Officer
    (an officer who commands a group of soldiers, sailors, etc.)
    Topics War and conflictc2
See CO in the Oxford Advanced American Dictionary
previously
adverb
 
 
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