Meaning

noun migration into a place (especially migration to a country of which you are not a native in order to settle there)

noun the body of immigrants arriving during a specified interval

originEtymology tree English immigrate Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English -ion English immigration From immigrate + -ion.

Etymology from Wiktionary, CC BY-SA 3.0