Added 9 October 2026 jump-start noun Categories: Actions noun ! Definition from WordNet 3.1, Princeton University. More about jump-start at Wordnik → Where our words come from → Starting an automobile engine that has a weak battery by means of jumper cables to another car. my battery was dead so I had to get a jumpstart from my neighbor verb Start (a car engine whose battery is dead) by connecting it to another car's battery. Start or re-start vigorously. The Secretary of State intends to jumpstart the Middle East Peace Process Related Words: launchingjumpstartlaunchkick-startgalvanizebolsterboostspurpromotepushpropelaccelerate Back to today's word