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

 

vivacious

 adjective
adjective
BrE BrE//vɪˈveɪʃəs//
 
; NAmE NAmE//vɪˈveɪʃəs//
 
, also NAmE//vaɪˈveɪʃəs//
 
(approving) Energetic
 
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(especially of a woman) having a lively, attractive personality He had three pretty, vivacious daughters. She appeared to be her old, vivacious self again. See related entries: Energetic Word Origin mid 17th cent.: from Latin vivax, vivac- ‘lively, vigorous’ (from vivere ‘to live’) + -ious.
See the Oxford Advanced American Dictionary entry: vivacious