English

Definition of Big Brother noun from the Oxford Advanced Learner's Dictionary

 

Big Brother

 noun
noun
BrE
 
; NAmE
 
[singular]
 
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a leader, a person in authority or a government that tries to control people’s behaviour and thoughts, but pretends to act for their benefit From George Orwell’s novel Nineteen Eighty-Four, in which the leader of the government, Big Brother, had total control over the people. The slogan ‘Big Brother is watching you’ reminded people that he knew everything they did.
See the Oxford Advanced American Dictionary entry: Big Brother