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big brother

 
pronunciation:
bIg bruh thr
part of speech: noun
definition 1: an elder brother.
definition 2: (sometimes cap.) a man who befriends and guides a disadvantaged boy, often under the auspices of a social agency.
definition 3: (cap.) in the 1948 novel Nineteen Eighty-Four by George Orwell, an invisible but all-seeing and omnipotent force representing totalitarian government.