(dated) A knob attached to the steering wheel of a motor vehicle, especially before the widespread availability of power steering, helping the driver steer with one arm.

(idiomatic, slang, dated) A knob attached to the steering wheel of an automobile, especially before the widespread availability of power steering, helping the driver steer with one arm and leaving the other arm free to provide romantic attention to a companion.

Alternative form of knob-and-tube

Of or pertaining to a type of electrical wiring consisting of insulated conductive copper wire affixed by porcelain hardware and protected in vulnerable areas by insulated cloth sleeving. Widely used in North America during the late 19th and early 20th centuries.

plural of knob-twiddler

Alternative form of knob-twiddler

plural of knob twiddler

(informal) A technician whose job entails adjusting electronic devices via knobs.

Alternative form of knobhead

plural of knob head