/ Dictionary / Index I INS: Meaning and Definition of Find definitions for: INS Pronunciation: [key] Immigration and Naturalization Service. International News Service, a news-gathering agency: merged in 1958 with United Press to form United Press International. ins. Pronunciation: [key] inches. inscribed. inspector. insulated. insurance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ins (Thesaurus) inrush in saecula saeculorum* Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language