Definition of function key in English:

function key

Line breaks: func|tion key

noun

Computing
A button on a computer keyboard, distinct from the main alphanumeric keys, to which software can assign a particular function: I can toggle between the two files by pressing a function key
More example sentences
  • You use the four way key to select a function, and more importantly the right function key to choose functions.
  • To get around that, map an unused function key to run the program.
  • When the system is booted up and is showing the login screen, press and hold the Ctrl-Alt keys and press the F1 function key.

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