Definition of "knob"
noun:
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A rounded protuberance, handle, or control switch.
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A prominent rounded hill.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A rounded ornament on the hilt of an edged weapon; a pommel.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A prominent, rounded bump along a mountain ridge.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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