Definition of weighty adjective from the Oxford Advanced American Dictionary

     

    weighty

     adjective
    adjective
    NAmE//ˈweɪt̮i//
     
    (weightier, weightiest)(formal)
     
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  1. 1important and serious weighty matters
  2. 2heavy a weighty volume/tome
NAmE//ˈweɪt̮l̩i//
 
adverb
weightiness
 
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NAmE//ˈweɪt̮inəs//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: weighty