Definition of upgrade noun from the Oxford Advanced Learner's Dictionary

     

    upgrade

     noun
    noun
    BrE BrE//ˈʌpɡreɪd//
     
    ; NAmE NAmE//ˈʌpɡreɪd//
     
     
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  1. 1the act of making a piece of machinery, computer system, etc. more powerful and efficient; the more powerful and efficient piece of machinery, computer system, etc. instructions for installing an upgrade to the existing system
  2. 2the act of giving somebody a better seat on a plane, room in a hotel, etc. than the one that they paid for; the seat, room, etc. itself Frequent flyers qualify for a free upgrade.
  3. 3the act of improving the condition of a building, etc. in order to provide a better service The building urgently needs an upgrade.

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