em·i·gra·tion \ˌeməˈgrāshən\noun (-s) Etymology: Late Latin emigration-, emigratio, from Latin emigratus + -ion-, -io -ion 1.: an act or instance of emigrating : departure from a place of abode, natural home, or country for life or residence elsewhere < several separate Oregon emigrations > < considered the advantage of emigration > 2.: a body of emigrants < the emigration set out in early spring > 3.: diapedesis 1