Definition of Friday from the Oxford Advanced Learner's Dictionary

 

Friday

 
BrE
 
; NAmE
 
(also Man Friday
BrE
 
; NAmE
 
)
 
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a character in Daniel Defoe's novel Robinson Crusoe. He becomes Crusoe's faithful servant after Crusoe saves him from being eaten by cannibals. The phrase Man Friday or Girl Friday is sometimes used to describe an assistant who does many different jobs in an office.