Breadcrumb Home > Dictionary > Index I immigration: Meaning and Definition of Find definitions for: im•mi•gra•tion Pronunciation: (im"i-grā'shun), [key] — n. the act of immigrating. a group or number of immigrants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: immigration (Thesaurus) immigrate Immigration and Nationality Act ✖ Related Content Daily Word Quiz: umbrage Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language