leader

US /ˈliː.dɚ/
UK /ˈliː.dɚ/
"leader" picture
1.

the person who leads or commands a group, organization, or country

:
The team's leader motivated everyone to work harder.
She was elected as the new party leader.
2.

a person or thing that is the best or most successful in a particular field

:
This company is a market leader in renewable energy.
He's considered a thought leader in his industry.