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spark plug: Meaning and Definition of
spark' plug"
Pronunciation: [key]
- a device designed to fit in each cylinder of a gasoline-powered internal-combustion engine and to produce the electric spark for igniting the mixture of gasoline and air.
- a person who leads, inspires, or animates a group.
spark•plug
Pronunciation: (spärk'plug"), [key]
— -plugged, -plug•ging.
- to lead, inspire, or animate something or someone.
