(n) an electrical switch operated by pressing, Syn. button, push, Example:the elevator was operated by push buttons; the push beside the bed operated a buzzer at the desk
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
. (Elec.) A simple device, resembling a button in form, so arranged that pushing it closes an electric circuit, as of an electric bell; -- called also button. [ Webster 1913 Suppl. ]