<p><strong>Noun</strong></p><ul><li>a common measure of area: in the U.S. and U.K., 1 acre equals 4,840 square yards (4,047 square meters) or 0.405 hectare; 640 acres equals one square mile.</li><li>acres, lands; land: wooded acres.</li><li>Informal: large quantities: acres of Oriental rugs.</li><li>Archaic: a plowed or sown field.</li></ul>