noun
- a device in an engine that produces an electric spark to ignite fuel
- a person who energizes or motivates others
Usage: informal
verb
- to energize or motivate a group or activity
Usage: informal
Examples
- The mechanic replaced the old sparkplug in my car.
- A faulty sparkplug can cause engine problems.
- She was the sparkplug of the team, always encouraging everyone.
- The new manager sparkplugged the department’s productivity.
- Without a good sparkplug, the project lost momentum.
- He sparkplugged the fundraising campaign with his enthusiasm.