/ 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: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language