1. a device designed to close or open an electric circuit when a button or knob is depressed, and to return to a normal position when it is released.
2. the button or knob depressed. Also,push'but"ton.
Pronunciation: (poosh'but"n),[key] —adj. 1. operated by or as if by push buttons: push-button tuning. 2. using complex, automated weapons, as long-range missiles, that require only simple initial steps to put them into action: push-button warfare.