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

 

asinine

 adjective
adjective
BrE BrE//ˈæsɪnaɪn//
 
; NAmE NAmE//ˈæsɪnaɪn//
 
(formal) Stupid
 
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stupid or silly synonym ridiculous See related entries: Stupid Word Origin late 15th cent.: from Latin asininus, from asinus ‘ass’.
See the Oxford Advanced American Dictionary entry: asinine