say it: EE-sturn
eastern is an adjective meaning "lying toward or situated in the east". It carries 5 recorded senses.
of or characteristic of eastern regions of the United States
“the Eastern establishment”
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 eastern 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.