Definition of upgrade verb from the Oxford Advanced American Dictionary

     

    upgrade

     verb
    verb
    NAmE//ˈʌpɡreɪd//
     
    , NAmE//ˌʌpˈɡreɪd//
     
    [often passive]Verb Forms present simple I / you / we / they upgrade
     
    ,
     
    he / she / it upgrades
     
    ,
     
    past simple upgraded
     
    ,
     
    -ing form upgrading
     
    ,
     
     
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  1. 1upgrade something to make a piece of machinery, computer system, etc. more powerful and efficient
  2. 2upgrade somebody (to something) to give someone a better seat on a plane, room in a hotel, etc. than the one that they have paid for On the flight back, we were upgraded to business class.
  3. 3 upgrade something to improve the condition of a building, etc. in order to provide a better service to upgrade the town's public facilities The trail was upgraded for use by bikers. compare downgrade
  4. 4 upgrade somebody (to something) to give someone a more important job synonym promote
NAmE//ˈʌpɡreɪd//
 
noun instructions for installing an upgrade to the existing system Frequent flyers qualify for a free upgrade.