knob
Knob (noun) means a rounded lump or handle, especially one used to turn or open something. Example: “Turn the volume knob to the left to make it quieter.”
How to use knob
Learner’s notesIn plain EnglishA rounded lump, especially a control you turn, like on a radio or door.
In British slang, "knob" is also a crude term for the penis, or an insult meaning an idiot — context makes the meaning obvious.
Word forms
- Plural
- knobs
- Third person singular
- knobs
- Past tense
- knobbed
Etymology
From Middle English knobbe, related to Middle Low German knobbe ("knob, bud"), part of a wider family of Germanic words for lumps and bumps.