Definition of driverless in US English:

driverless

adjective

  • 1(of a vehicle) capable of traveling without input from a human operator, by means of computer systems working in conjunction with on-board sensors.

    ‘the chief executive showed off by riding into an exhibit hall in the back seat of a driverless car’
  • 2Lacking a driver.

    ‘the driverless train began to roll, rapidly picking up speed as it lumbered past six stations’

Pronunciation

driverless

/ˈdraɪvərləs//ˈdrīvərləs/