/ Dictionary / Index I irreducible: Meaning and Definition of Find definitions for: ir•re•duc•i•ble Pronunciation: (ir"i-d'su-bul, -dy'-), [key] — adj. not reducible; incapable of being reduced or of being diminished or simplified further: the irreducible minimum. incapable of being brought into a different condition or form. of or pertaining to a polynomial that cannot be factored. of or pertaining to a group that cannot be written as the direct product of two of its subgroups. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: irreducible (Thesaurus) irredentist irreflexive 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