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

 

officiously

 adverb
adverb
BrE BrE//əˈfɪʃəsli//
 
; NAmE NAmE//əˈfɪʃəsli//
 
(disapproving)
 
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in a way that shows that you are too ready to tell people what to do or to use the power you have to give orders synonym self-importantly ‘You can't park here,’ he said officiously.