Dictionary Definition :
Definition[1]
:
The "greatly ignorant", name of a monastery and title of its patriarch, of the Ch'an (Zen) or intuitive school.
Source
:
A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous
Definition[2]
:
(人名)洪州高安大愚禪師嗣於歸宗。歸宗嗣於馬祖。大愚山號。見傳燈錄十。
Source
:
丁福保《佛學大辭典》