Definitions

1. adjective

Without a crew or personnel.

“The ship sailed crewless for several days before being rescued.”

2. adjective

Lacking a crew or personnel.

“The abandoned aircraft remained crewless in the desert.”

3. adjective

Without a crew on board.

“The crewless submarine was discovered in international waters.”

4. noun

A state of being without a crew or personnel.

“The crewlessness of the ship was a major concern for the authorities.”