gatekeeper

Plural: gatekeepers

Noun

• someone who controls access to something
  • "there are too many gatekeepers between the field officers and the chief"
• someone who guards an entrance
• A person or group who controls access to something or somebody.
• A person who guards or monitors passage through a gate.
• A common orange and brown butterfly with eyespots, Pyronia tithonus, of the family Nymphalidae.
• In dissociative identity disorder, an aspect of the personality that controls access to the various identities.
• One who gatekeeps.
• A provider of core platform services with specific characteristics (Regulation (EU) 2022/1925 of the European Parliament and of the Council)

Synonyms

door guard, doorkeeper, doorman, hall porter, ostiary, porter