名詞 midwest:

1. the north central region of the United States (sometimes called the heartland or the breadbasket of America)
   同義詞：middle west, midwestern United States

1. Chicago, the metropolis of the Midwest.
   芝加哥，中西部的大都會

Mid.west

NONE（無詞性）
A region of the north-central United States around the Great Lakes and the upper Mississippi Valley. It is generally considered to include Ohio, Indiana, Illinois, Michigan, Wisconsin, Minnesota, Iowa, Missouri, Kansas, and Nebraska. The area is known for its rich farmlands and highly industrialized centers.
美國中西部：美國中北部五大湖區(qū)及密西西比河上游河谷周圍的地區(qū)。通常認為包括俄亥俄州、印第安納州、伊利諾斯州、密歇根州、威斯康星州、明尼蘇達州、衣阿華州、密蘇里州、堪薩斯州及內(nèi)布拉斯加州。該地區(qū)以肥沃的耕地及高度工業(yè)化的工業(yè)中心而聞名

【引伸】
Midwest.ern
adj.（形容詞）
Midwest.erner
n.（名詞）