say it: nahb
knob is a noun meaning "a circular rounded projection or protuberance". It carries 4 recorded senses.
a circular rounded projection or protuberance
a round handle
any thickened enlargement
an ornament in the shape of a ball on the hilt of a sword or dagger
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for knob come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.