<p><strong>Adjective</strong></p><ul><li>Not reducible; incapable of being reduced or of being diminished or simplified further:<ul><li>The irreducible minimum.</li><li>Incapable of being brought into a different condition or form.</li><li>Mathematics: Of or relating to a polynomial that cannot be factored.</li><li>Of or relating to a group that cannot be written as the direct product of two of its subgroups.</li></ul></li></ul>