Definitions:

1. Occasionally used to describe modern taxi drivers. NOUN
   • The hack-driver knew every shortcut through the bustling city streets.
2. Refers to a driver of a hackney carriage, a vehicle for hire in urban areas, common before automobiles became prevalent. NOUN
   • The hack-driver waited patiently for passengers outside the train station.

Synonyms:

• cab driver
• chauffeur
• coachman
• taximan
• trxi driver