Definition of meta key in US English:

meta key

noun

Computing
  • A function key on a keyboard that is activated by simultaneously holding down a control key.

    • ‘Become familiar with each of the tools’ behaviour, and it's modified behaviour in conjunction with the meta keys.’
    • ‘It goes against the grain to leave anyone out simply because they can't read text on a video display or press both the meta key and F1 simultaneously.’
    • ‘If the above meta keys do not work for some reason you can use the escape key instead by typing it as a separate keystroke.’
    • ‘The keyboard commands are formed by holding down the control and/or meta keys while typing a keystroke that identified the command.’
    • ‘These two keys are called the control and meta keys.’

Pronunciation

meta key

/ˈmedəˌkē/