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Noun: big brother
  1. An older brother
    "His big brother always looked out for him at school"
Noun: Big Brother
  1. A totalitarian leader and invader of privacy
     
  2. A reality television show format where contestants live together in an isolated house
    "She was a contestant on Big Brother last season"

Derived forms: big brothers

Type of: authoritarian, blood brother, brother, dictator

Encyclopedia: Big brother

Big Brother