Definition that contains on and off
- qualified holding appropriate documentation and officially on record as qualified to perform a specified function or practice a specified skill
- certified holding appropriate documentation and officially on record as qualified to perform a specified function or practice a specified skill
- relay electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit
- slipper low footwear that can be slipped on and off easily; usually worn indoors
- gangway a temporary bridge for getting on and off a vessel at dockside
- blinker a light that flashes on and off; used as a signal or to send messages
- flasher a light that flashes on and off; used as a signal or to send messages
- flasher an electrical device that automatically turns a lamp on and off (as for an advertising display)
- gangplank a temporary bridge for getting on and off a vessel at dockside
- turncock one employed to control water supply by turning water mains on and off