Those who have attained the capacity and necessary knowledge of jurisprudence to make independent judgments (ijtihad) on cases concerning which they are consulted are called mujtahids. In contrast to Shi'i law, in Sunnism the 'door of ijtihad' has been closed.
MUJTAHIDS
Meaning of MUJTAHIDS in English
Advanced Islamic English dictionary. Расширенный исламский словарь английского языка. 2012