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

otiose

adjective
 
/ˈəʊtiəʊs/
 
/ˈəʊʃiəʊs/
(formal)
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  1. having no useful purpose synonym unnecessary
    • an otiose round of meetings
    Word Originlate 18th cent.: from Latin otiosus, from otium ‘leisure’.
See otiose in the Oxford Advanced American Dictionary
trait
noun
 
 
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