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

     

    gatekeeper

     noun
    noun
    BrE BrE//ˈɡeɪtkiːpə(r)//
     
    ; NAmE NAmE//ˈɡeɪtkiːpər//
     
     
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  1. 1a person whose job is to check and control who is allowed to go through a gate
  2. 2a person, system, etc. that decides whether somebody/something will be allowed, or allowed to reach a particular place or person His secretary acts as a gatekeeper, reading all mail before it reaches her boss. Literacy and maths are the gatekeeper skills that give kids access to academic success.
See the Oxford Advanced American Dictionary entry: gatekeeper