Definition of diligent adjective from the Oxford Advanced Learner's Dictionary

 

diligent

 adjective
adjective
BrE BrE//ˈdɪlɪdʒənt//
 
; NAmE NAmE//ˈdɪlɪdʒənt//
 
(formal) Job skills and personal qualities
 
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showing care and effort in your work or duties a diligent student/worker See related entries: Job skills and personal qualities Word Origin Middle English: via Old French from Latin diligens, diligent- ‘assiduous’, from diligere ‘love, take delight in’.
See the Oxford Advanced American Dictionary entry: diligent