American English

Definition of commander-in-chief noun from the Oxford Advanced American Dictionary

 

commander-in-chief

 noun
noun
 
(abbreviation C-in-C) (pl. commanders-in-chief)
 
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the officer who commands all the armed forces of a country or all its forces in a particular area commander-in-chief of the armed forces
See the Oxford Advanced Learner's Dictionary entry: commander-in-chief