say it: CHEEK-bohn
cheekbone is a noun meaning "the arch of bone beneath the eye that forms the prominence of the cheek". It carries one recorded sense.
the arch of bone beneath the eye that forms the prominence of the cheek
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 cheekbone 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.