Definition of additional adjective from the Oxford Advanced American Dictionary

      

    additional

     adjective
    adjective
    NAmE//əˈdɪʃənl//
     
     
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  1. 1  more than was first mentioned or is usual synonym extra
  2. 2 additional resources/funds/security The government provided an additional $25 million to expand the service.
additionallyadverb
 
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synonym in addition Additionally, the bus service will run on Sundays, every two hours.
See the Oxford Advanced Learner's Dictionary entry: additional