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

  

beneficial

 adjective
adjective
BrE BrE//ˌbenɪˈfɪʃl//
 
; NAmE NAmE//ˌbenɪˈfɪʃl//
 
 
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beneficial (to something/somebody) (formal) improving a situation; having a helpful or useful effect synonym advantageous, favourable A good diet is beneficial to health. They finally came to a mutually beneficial agreement. opposite detrimental Word Origin late Middle English: from late Latin beneficialis, from beneficium ‘favour, support’, from bene ‘well’ + facere ‘do’.Extra examples I think it would be beneficial for each committee member to have a copy of the report. Some alternative treatments may prove highly beneficial. The arrangement was mutually beneficial. Lowering salt intake has a beneficial effect on blood pressure. Relaxation classes can be beneficial to people of all ages. The relationship was to prove mutually beneficial over the years. We only fund projects we consider to be socially beneficial. Work experience is usually highly beneficial for students.
See the Oxford Advanced American Dictionary entry: beneficial