spark' plug"

1. 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.
2. Informal.a person who leads, inspires, or animates a group.


Pronunciation: (spärk'plug"), [key]
v.t., -plugged, -plug•ging. Informal.
to lead, inspire, or animate something or someone.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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