Definitions

1. noun

a person responsible for maintaining and supervising a road or a network of roads, especially a chief engineer or an official in charge of road maintenance and construction.

“The roadmaster of the county oversaw the repairs to the highway after the winter storm.”

2. noun

a person who has expert knowledge or control over a particular area or activity, especially in a specific industry.

“The roadmaster of the motorcycle company designed the new line of off-road bikes.”