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What is "push-button"

Longman Dictionary of Contemporary English
push-button
adjective
EXAMPLES FROM OTHER ENTRIES
▪ push-button warfare
▪ a push-button phone
▪ the push-button piloting of a ship
EXAMPLES FROM CORPUS
▪ An ordinary push-button switch triggers the monostable whose output goes from Logic 0 to 1.
▪ An ordinary push-button switch usually produces several pulses instead of one.
▪ Fibre-optic communications, push-button telephones and microcomputers won't stop the country from literally collapsing around our ears.
▪ For a start, it is the only tractor on the market with an electronic push-button throttle.
▪ High railings guarded the small courtyard gardens, the gates of which were usually protected by push-button security-code entry locks.
▪ If you have a push-button phone, you can choose your reading by pressing any number from 1-78.
▪ When I was born, we had telephones-we even had push-button telephones.
Douglas Harper's Etymology Dictionary
push-button

"characterized by the use of push-buttons," 1945, originally of military systems, earlier "operated by push-buttons" (1903), from push-button (n.), 1865, from push (v.) + button (n.). Earlier was press-button (1892), from the noun (1879).

Wiktionary
push-button

a. Which can be initiated or activated at the push of a button. alt. An electrical switch activated by pressing a button. n. An electrical switch activated by pressing a button.

Wikipedia
Push-button

A push-button (also spelled pushbutton) or simply button is a simple switch mechanism for controlling some aspect of a machine or a process. Buttons are typically made out of hard material, usually plastic or metal. The surface is usually flat or shaped to accommodate the human finger or hand, so as to be easily depressed or pushed. Buttons are most often biased switches, though even many un-biased buttons (due to their physical nature) require a spring to return to their un-pushed state. Different people use different terms for the "pushing" of the button, such as press, depress, mash, hit, and punch.

Usage examples of "push-button".

Four recently invented, gearless electric elevators with push-button controls.

Basically, the war followed the pattern of earlier and equally or less bloody wars: despite improved techniques, automatic and robotic weapons, despite development of armed conflict to a push-button affair, the ordinary soldier, the common footslogger remained supreme.

Sometimes she missed the push-button conveniences that back on old Earth had eliminated the drudgery of monotonous household tasks.

The block was a solid version of the liquid soap the Federation provided in push-button dispensers.