/ Dictionary / Index A Antiballistic Missile Treaty: Meaning and Definition of Find definitions for: An'tiballis'tic Mis'sile Trea"ty Pronunciation: [key] an agreement between the U.S. and U.S.S.R., signed May 26, 1972, limiting the number of ABM deployment areas, launchers, and interceptors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. antiballistic antibaryon Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language