American English

Definition of diligent adjective from the Oxford Advanced American Dictionary

 

diligent

 adjective
adjective
NAmE//ˈdɪlədʒənt//
 
(formal)
 
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showing care and effort in your work or duties a diligent student/worker
 
adverb They worked diligently on the task they had been given.
See the Oxford Advanced Learner's Dictionary entry: diligent