Definition of bosun noun from the Oxford Advanced Learner's Dictionary

 

bosun

 noun
(also bo’sun, boatswain)noun
BrE BrE//ˈbəʊsn//
 
; NAmE NAmE//ˈboʊsn//
 
People in sea travel
 
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an officer on a ship whose job is to take care of the equipment and the people who work on the ship See related entries: People in sea travel
See the Oxford Advanced American Dictionary entry: bosun