<p><strong>Verb</strong></p><ul><li>(used with object): to alter; change.</li><li>Mathematics: to subject to permutation.</li></ul><p><strong>Noun</strong></p><ul><li>an act of revising.</li><li>a revised form of something; revision.</li><li>Printing: a proof sheet taken after alterations have been made, for further examination or correction.</li></ul>