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

 

lascivious

 adjective
adjective
BrE BrE//ləˈsɪviəs//
 
; NAmE NAmE//ləˈsɪviəs//
 
(formal, disapproving)
 
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feeling or showing strong sexual desire a lascivious person lascivious thoughts Word Origin late Middle English: from late Latin lasciviosus, from Latin lascivia ‘lustfulness’, from lascivus ‘lustful, wanton’.
See the Oxford Advanced American Dictionary entry: lascivious