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

 

otiose

 adjective
adjective
BrE BrE//ˈəʊtiəʊs//
 
; NAmE NAmE//ˈoʊʃioʊs//
 
(formal)
 
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having no useful purpose synonym unnecessary an otiose round of meetings Word Origin late 18th cent.: from Latin otiosus, from otium ‘leisure’.
See the Oxford Advanced American Dictionary entry: otiose