<p><strong>Verb</strong></p><ul><li>(used with object) to keep possession of.</li><li>Synonyms: preserve, hold</li><li>Antonyms: lose, loose</li><li>to continue to use, practice, etc.: to retain an old custom.</li><li>to continue to hold or have: to retain a prisoner in custody; a cloth that retains its color.</li><li>to keep in mind; remember.</li><li>Antonyms: forget</li><li>to hold in place or position.</li><li>to engage, especially by payment of a preliminary fee: to retain a lawyer.</li><li>Medicine/Medical: to keep in the body, especially abnormally; fail to eliminate: I was referred to a specialty clinic and they discovered that I was retaining urine.</li></ul>