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English definition of “knob”

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knob

noun
 
 
/nɒb/
[C] a round handle, or a round button on a machine: a door knob Turn the black knob to switch on the radio.Electrical switches and connectionsSpherical, circular and annular objectsGeometrical shapes
a knob of butter UK a small lump of butterDairy products and eggs
(Definition of knob from the Cambridge Learners Dictionary © Cambridge University Press)
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