function key Meaning in the Cambridge English Dictionary
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Meaning of “function key” in the English Dictionary

"function key" in British English

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function keynoun [C]

uk   us  
one of the ​keys at the ​top of the ​keyboard that make the ​computerperformparticularoperations
(Definition of function key from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"function key" in Business English

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function keynoun [C]

uk   us   IT
one of the ​keys on a ​computer with F1, F2, etc. ​printed on them, which make a particular ​processhappen when you ​press them: You can just ​press the ​functionkey F5 to ​refresh the ​page.
(Definition of function key from the Cambridge Business English Dictionary © Cambridge University Press)
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