say it: mi-DWEST
midwest 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)
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 midwest 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.