Pronunciation: (u-mēr', ā-mēr', ā'mēr),[key] —n. 1. a chieftain, prince, commander, or head of state in some Islamic countries.
2. a title of honor of the descendants of Muhammad.
3. (cap.) the former title of the ruler of Afghanistan.
4. a title of certain Turkish officials. Also,emeer,amir,ameer.