Definition of "push-button" [push-button]

• Which can be initiated or activated at the push of a button. (adjective)
• An electrical switch activated by pressing a button. (noun)

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• "Ensuring that push-button ignition systems can turn the engine off in an emergency as easily as they turn it on.."
• "Other features include a micro push-button LED light (illegal in some states – check first!), a lightweight housing, and a large circular field of view. $89 for the three-pin, $99 for the five-pin."
• "Nathaniel Letton's hand, creeping toward the push-button on the desk, was abruptly arrested."