lineleader
nounUK /ˈlaɪnˌliːdə/
US /ˈlaɪnˌliːdər/
The lineleader is the kid who goes first in a line.
Ms. Lee picked Sam to be the lineleader today.
RELATED WORDS
OTHER MEANINGS
2. A person who guides or directs a line of people or vehicles.
The lineleader waved the hikers forward along the trail.
3. The first vehicle or person in a procession or convoy.
The lineleader of the parade carried a bright flag.
4. A worker who heads a production line in a factory.
The lineleader checked each unit before it moved on.