Knob n. : A hard protuberance; a hard swelling or rising; a bunch; a lump; as, a knob in the flesh, or on a bone.

Knob n. : A knoblike ornament or handle; as, the knob of a lock, door, or drawer.

Knob n. : A rounded hill or mountain; as, the Pilot Knob.

Knob n. : See Knop.

Knob v. i. : To grow into knobs or bunches; to become knobbed.

Example:
How to switch shifter Knob on my my 1998 saturn coupe?

Taxonomy
Knob, free encyclopedia, search, House band, free dictionary, pulls, twists, Control knob, Brodie knob, steering wheel, rounded hill, the Appalachians, Israeli, Electro-House, disambiguation pages, Personal tools, Interaction, Toolbox.

Defination from the web:
knob, controls a device. Brodie knob on the steering wheel. A prominent rounded hill or mountain, particularly in the Appalachians and the Ozarks. Knob (band), an Israeli Electro-House band. A term for the penis. This disambiguation page lists articles associated with the same title. ...