Simple Definition of knob
: a round switch on a television, radio, etc.
: a round handle on a door, drawer, etc.
: a small lump or piece of something
Examples of knob in a sentence
a carved walking stick with a silver knob
<toss a knob of butter into the frying pan>
Origin of knob
Middle English knobbe; akin to Middle Low German knubbe knob
First Known Use: 14th century
KNOB Defined for Kids
Definition of knob for Students
1 : a small rounded handle
2 : a rounded switch on an electronic device
3 : a rounded lump <Her dog has a knob of a tail.>
4 : a rounded hill
Seen and Heard
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