アメリカ合衆国西部
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のコンテキスト アメリカ合衆国西部
アメリカ合衆国西部（アメリカがっしゅうこくせいぶ、英語: Western United States、通常は American Westまたは単に The West）は、アメリカ合衆国の西部にある諸州の伝統的な呼び方である。
アメリカ合衆国は建国以来西へ西へと拡がってきたので、西部の定義は時代と共に変わってきた。西部の東端は初期はアパラチア山脈と考えられていたが徐々に西へと移動し、現在ではミシシッピ川とする考え方が多い。
「西部」はアメリカの歴史の中で重要な役割を演じてきた。古西部はアメリカの民間伝承に留められている。
