Definitions

1. noun

a person who leads a procession, especially in a ceremonial or academic context

“The student was chosen as the dux of the graduation ceremony.”

2. noun

the person who tops the list in a class or group, especially in academic achievement

“She was the dux of her year and received a scholarship to university.”

3. noun

a chief or leader, especially in a formal or official capacity

“The dux of the country’s military forces was invited to the peace talks.”