plural knobs
1
: a round switch on a television, radio, etc.
The left knob [=dial] controls the volume.
2
: a round handle on a door, drawer, etc.
The knob [=doorknob] is stuck and I can't open the door!
a carved walking stick with a silver knob
3
chiefly British
: a small lump or piece of something
a knob of butter/coal
4
British, informal + impolite
: penis
Cite this Entry
“Knob.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/knob. Accessed 14 Apr. 2026.
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