Definition of youthful adjective from the Oxford Advanced American Dictionary

     

    youthful

     adjective
    adjective
    NAmE//ˈyuθfl//
     
     
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  1. 1typical of young people youthful enthusiasm/energy/inexperience
  2. 2 young or seeming younger than you are She's a very youthful 65. a youthful appearance
NAmE//ˈyuθfəli//
 
adverb to act youthfully
youthfulness
 
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noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: youthful