A button on a computer keyboard or telephone keypad that is marked with a # sign: pressing and holding the hash key activates silent/vibrate mode
More example sentences
- Graphics are perfect, just have to remember to press the hash key to get the game in fullscreen.
- You may need to use the hash key (#) to finish your number - please listen to the instructions given.
- I feel sorry for the thousands stuck in a perpetual, message-leaving limbo after pressing that bloody hash key, just hanging around awaiting your next important instruction.
Definition of hash key in:
- The US English dictionary