<p><strong>Noun</strong></p><ul><li>Something that must come before or is necessary to a subsequent result; condition: a precondition for a promotion.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) To subject (a person or thing) to a special treatment in preparation for a subsequent experience, process, test, etc.: to precondition a surface to receive paint.</li></ul>