<p><strong>Adverb</strong></p><ul><li>high up; far above the ground</li><li>Nautical: on the masts; in the rigging; overhead</li><li>(on a square-rigged sailing ship) in the upper rigging, specifically, on or above the lower yards (alow)</li><li>in or into the air</li></ul><p><strong>Preposition</strong></p><ul><li>on or at the top of: flags flying aloft the castle.</li></ul>