The pl. of Muhajir. The exiles or refugees. A term used for all those converts to Islam who fled with their Prophet from Makkah, Under the title are also included all who from time to time joined Muhammad at al-Madinah, either from Makkah or from any other quarter, up to the taking of Makkah in A.H. 8. They rank first in order amongst the Companions of the Prophet.
Based on Hughes, Dictionary of Islam