noun
settlement of the American frontier; settlement of the Old West
Historical term referring to the westward expansion and settlement of the American frontier, especially during the 19th century.
西部開拓時代の生活は厳しかった。
Life during the settlement of the American frontier was harsh.
この映画は西部開拓を描いている。
This movie depicts the settlement of the Old West.
Compound of 西部 (seibu, 'western part') and 開拓 (kaitaku, 'reclamation' or 'pioneering'), referring specifically to the American frontier.