Ijtihad Definition
    noun
  
 (Islam) The process of Muslim jurists making a legal decision by independent interpretation of the Qur'an and the Sunna; such a jurist is a mujtahid.
Wiktionary 
(Islam) The process of Muslim jurists making a legal decision by independent interpretation of the Qur'an and the Sunna; such a jurist is a mujtahid.