/ Dictionary / Index I irreplaceable: Meaning and Definition of Find definitions for: ir•re•place•a•ble Pronunciation: (ir"i-plā'su-bul), [key] — adj. incapable of being replaced; unique: an irreplaceable vase. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: irreplaceable (Thesaurus) irrepealable irreplevisable Related Content Daily Word Quiz: feral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language