<p><strong>Verb</strong></p><ul><li>to change or alter, as in form, appearance, character, or substance: to vary one's methods.</li><li>to cause to be different from something else: The orchestra varied last night's program with one new selection.</li><li>to avoid or relieve from uniformity or monotony; diversify: to vary one's diet.</li><li>Music: to alter (a melody or theme) by modification or embellishments without changing its identity.</li></ul><p><strong>Noun</strong></p><ul><li>an act of varying; a variation.</li><li>a form or version of something: The project had many variations.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to show diversity; be different: The age at which children are ready to read varies.</li><li>to undergo change in appearance, form, substance, character, etc.: The landscape begins to vary as one drives south.</li><li>to change periodically or in succession; differ or alternate: Demand for certain products varies with the season.</li><li>to diverge; depart; deviate (usually followed by from): to vary from the norm.</li><li>Mathematics: to be subject to change.</li><li>Biology: to exhibit variation.</li></ul>