midwestern united states is a noun meaning "the north central region of the United States (sometimes called the heartland or the breadbasket of America)". It carries one recorded sense.
the north central region of the United States (sometimes called the heartland or the breadbasket of America)
Definitions, synonyms and semantic relations for midwestern united states come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.