Definition of big brother
1 : an older brother
2 : a man who serves as a companion, father figure, and role model for a boy
3 capitalized both Bs [Big Brother, personification of the power of the state in 1984 (1949) by George Orwell] a : the leader of an authoritarian state or movementb : an all-powerful government or organization monitoring and directing people's actions
First Known Use of big brother
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