1. operating or functioning without a crew; not requiring or having personnel to operate
Usage: commonly used in aviation and maritime contexts; increasingly used in technology and robotics

Examples

• The airline tested a crewless cargo aircraft on a long-distance flight.
• Crewless ships are being developed to reduce operational costs.
• The company invested in crewless delivery drones for urban logistics.
• Modern crewless submarines can explore deep ocean trenches.
• Crewless spacecraft have successfully completed missions to distant planets.
• The port is transitioning to crewless container handling systems.