say it: KAHY-zur
kaiser is a noun meaning "the title of the Holy Roman Emperors or the emperors of Austria or of Germany until 1918". It carries one recorded sense.
the title of the Holy Roman Emperors or the emperors of Austria or of Germany until 1918
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 kaiser 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.