say it: HAHRT-land
heartland is a noun meaning "the central region of a country or continent; especially a region that is important to a country or to a culture". It carries one recorded sense.
the central region of a country or continent; especially a region that is important to a country or to a culture
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 heartland 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.