Definition of vivacious adjective from the Oxford Advanced American Dictionary

 

vivacious

 adjective
adjective
NAmE//vɪˈveɪʃəs//
 
, NAmE//vaɪˈveɪʃəs//
 
(approving)
 
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(especially of a woman) having a lively, attractive personality He had three pretty, vivacious daughters.
vivaciously
 
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adverb
NAmE//vɪˈvæsət̮i//
 
, NAmE//vaɪˈvæsət̮i//
 
noun [uncountable] He was charmed by her beauty and vivacity.
See the Oxford Advanced Learner's Dictionary entry: vivacious