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co-worker

noun [C]
 
 
/ˌkəʊˈwɜː.kər/ US  /ˌkoʊˈwɝː.kɚ/

Definition

a person who you work with, especially someone with a similar job or level of responsibilityEmployees and colleagues
(Definition of co-worker noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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