Definition of "jump-start"

jump-start

verb
third-person singular simple present jump-starts, present participle jump-starting, simple past and past participle jump-started
1. (transitive) To start a motor vehicle by passing an electrical current from a charged battery to the discharged ("dead" or "flat") battery of the vehicle being started, by using booster cables to temporarily connect the two batteries in parallel.
2. (transitive, figuratively) To reactivate or rejuvenate.
  Quotations
  ‘That debt means we can’t access credit to jump-start the economy as needed.’
  2022, NoViolet Bulawayo, Glory, Chatto & Windus, page 262
noun
plural jump-starts
1. The process or result of jump-starting a motor vehicle.
2. (sports) A false start