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Definition of Jump-start
1. Noun. 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"
2. Verb. Start (a car engine whose battery is dead) by connecting it to another car's battery. "These cars won't jump-start "
3. Verb. Start or re-start vigorously. ; "The Secretary of State intends to jumpstart the Middle East Peace Process"