say it: AHR-bi-tur
arbiter is a noun meaning "someone with the power to settle matters at will". It carries 2 recorded senses.
someone with the power to settle matters at will
“she was the final arbiter on all matters of fashion”
someone chosen to judge and decide a disputed issue
“the critic was considered to be an arbiter of modern literature”
“the arbitrator's authority derived from the consent of the disputants”
“an umpire was appointed to settle the tax case”
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 arbiter 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.