マニフェストデスティニーMeanings1nounManifest DestinyHistorical term for the 19th-century American belief that the United States was destined to expand across the continent.マニフェストデスティニーは、19世せい紀きのアメリカの領りょう土ど拡かく大だいを正せい当とう化かする考かんがえ方かただった。Manifest Destiny was an idea that justified American territorial expansion in the 19th century.