'Self-starter' definitions:

Definition of 'self-starter'

From: WordNet
noun
An energetic person with unusual initiative
noun
An electric starting motor that automatically starts an internal-combustion engine

Definition of 'Self-starter'

From: GCIDE
  • Self-starter \Self`-start"er\, n. A mechanism (usually one operated by electricity, compressed air, a spring, or an explosive gas), attached to an internal-combustion engine, as on an automobile, and used as a means of starting the engine without cranking it by hand; -- called also a starter. [Webster 1913 Suppl. +PJC]