leadengine
nounUK /ˈliːdˌɛndʒɪn/
US /ˈliːdˌɛndʒɪn/
A lead engine is the front train car that pulls the rest along.
The lead engine chugged loudly as it pulled the long line of cars.
OTHER MEANINGS
2. The main tool or program that drives a project forward.
Their new software became the lead engine of the whole campaign.
3. The strongest or most important part of a team.
She was the lead engine behind the winning strategy.
4. A search or marketing system that finds new customers.
The company used a lead engine to gather names of interested buyers.