Definition of expeditiously adverb from the Oxford Advanced Learner's Dictionary

 

expeditiously

 adverb
adverb
BrE BrE//ˌekspəˈdɪʃəsli//
 
; NAmE NAmE//ˌekspəˈdɪʃəsli//
 
(formal)
 
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in a way that works well without wasting time, money, etc. The work was carried out as expeditiously as possible.