<p><strong>Adjective:</strong></p><ul><li>Of the same age, date, or duration; equally old.</li><li>Example: Analysis has proved that this manuscript is coeval with that one.</li><li>Coincident: Leonardo da Vinci and Michelangelo were only approximately coeval.</li></ul><p><strong>Noun:</strong></p><ul><li>A coeval person or thing: He is more serious than his coevals.</li></ul>