/ Dictionary / Index B Bureau of Indian Affairs: Meaning and Definition of Find definitions for: Bu'reau of In'dian Affairs' Pronunciation: [key] — U.S. Govt. U.S. Govt. a division of the Department of the Interior that administers federal programs benefiting Native American peoples. Abbr.: BIA Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bureau of Customs Bureau of Internal Revenue Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language