American English

Definition of wasteful adjective from the Oxford Advanced American Dictionary

 

wasteful

 adjective
adjective
NAmE//ˈweɪstfl//
 
 
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using more of something than is necessary; not saving or keeping something that could be used The whole process is wasteful and inefficient. a wasteful use of resources wasteful of something an engine that is wasteful of fuel
NAmE//ˈweɪstfəli//
 
adverb
wastefulness
 
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noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: wasteful