say it: KOHST-lur
koestler is a noun meaning "British writer (born in Hungary) who wrote a novel exposing the Stalinist purges during the 1930s (1905-1983)". It carries one recorded sense.
British writer (born in Hungary) who wrote a novel exposing the Stalinist purges during the 1930s (1905-1983)
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 koestler 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.