jump-start noun 2verb 2forms 4 noun2 •The process or result of jump-starting a motor vehicle.I left my headlights on all night. Could you give me a jump-start? •A false start. verb2 •To start a motor vehicle with a discharged ("dead") battery by connecting it with jumper cables to an alternate source of electrical current, generally either the charged battery of another vehicle or a purpose-made device ("hotshot"). •(figurative) To reactivate or rejuvenate.Giving a really good speech at the convention could jump-start her political career. formsjump-started · jump-starting · jump-starts · jump starts